Product: Debt collection

XXXX XX/XX/XXXX IQ data international called me twice at my personal phone. Both calls were ignored because I was at work! So instead of leaving a message and waiting for a call back. The third time they decided to call me AT WORK and have this hour long chit chat. 
I explained to them that I did not have the money or the means to pay them and the women I talked to was very cooperative in trying to find a solution. Even going so far as to ask my what bills I pay monthly to figure a cost that I could pay on a payment plan. ( Where she grossly overestimated about {$300.00} ) and still I explained that I would have to talk to my exroommate who was also on the lease, where we were co-signed, and so we share the responsibility on the remaining debt. According to XXXX, about XXXX , on a bill I have already paid {$740.00} to, paid to the original apartment. 
Then they spoke to my exroommate ( who works in the same building I do ) and the woman we spoke to came up with a plan for her, my exroommate, to pay off the rest. 
They told her that if she paid {$100.00} that they could extend the payment to be due near the end of XXXX. In which time the exroommate was to get a loan to pay off the remaining balance. ( She has already applied and been approved for the loan and paid the money for the date extension ) Fast forward to today Friday, XX/XX/XXXX. Where once again I get a phone call on ym personal from XXXX. This time with a voicemail attached about the collection. 
I call them back on my break, because I for one, am confused. I thought the debt and the date had already been hashed out and don't understand why I'm receiving YET ANOTHER CALL. About something that already had a plan of action. 
This is where I talked with one of XXXX  associates, XXXX. Who must have lost her XXXX MIND. 
XXXX was set off by me chuckling. Yes how dare I laugh at her and the absurdity of the situation. 
She proceeds to tell me ( all of these conversations remember can be replayed and called back to because they record for 'quality ' ) That exroommate has made a payment of about {$600.00} but the rest has been denied.

So why are you calling me I ask?

Because your name is on the collection so you are responsible for the remanding balance due she replies.

Yes. I understand that. But a payment has already been made. Almost {$600.00} you just told me. But I can't tell you why the rest has been denied or any type of personal info on the exroommates account. You should probably get ahold of her. 
XXXX from XXXX did not like that answer. Continued to be hostile. Obtuse. And all together extremely unhelpful. And more and more personally offended that I was not giving her the information that she wanted. Or offering to pay up another XXXX ON THE SPOT. All while I'm still at work you recall. Instead of trying and waiting again to get ahold of the exroommate. 
Then she transfers me to a 'supervisor ' XXXX XXXX , who clearly will not have her job for very long. She was repulsive to have to have dealt with. Went STRAIGHT to yelling. Being defensive, aggressive, threatening and outright calling ME a liar. 
She changed her story multiple times. Gave me no clear answer on how much money they actually already collected ( from my exroommates bank account without permission ) refused to send me to someone less hostile who could actually help me. And then the two of them gave me the run-around like my future credit was some game to them. They clearly can not be held to any type of standard if that's how they are training their supervisors to behave.

So I decided to get in touch with my exroommate seeing as how the two children I was dealing with could not make the effort to talk to the person THEY ALREADY HAD AN AGREED UPON PAYMENT SYSTEM SET UP. 
She informed me then, that they had already came up with the earlier mentioned setup ( where she pays {$100.00} for good faith and until her loan came in. And by the end of XXXX she had a chance to pay. Again while she waits for the loan SHE WAS ALREADY ACCEPTED FOR ) SHE also informed me that XXXX   had already taken a payment from her. ALMOST {$800.00}!!! 
AND WHEN she tried to call to talk to the person who we had talked to previously, back on XX/XX/XXXX. XXXX and XXXX XXXX gave her the same hostility, threats and runaround of not having a person who works there capable of doing their job. 
I won't be marked down as 'refusal to pay ' when they have already dipped their nasty little fingers into someone else 's bank account. And they are running around lying about how much money is actually owed. I need an adult who can verify the payment plan WE first were agreed upon. 

It must also be noted, that XXXX has never made any attempt to send a first bill to begin with. Simply went straight to the harassing phone calls at work.