Product: Debt collection

I am making a complaint to Alliance One Debt collection Agency assigned by XXXX XXXX XXXX that were mistaken billing me due the lost of a partial payment I made with a check # XXXX posted to the XXXX XXXX Bank on XXXX XXXX for the amount of $ XXXX XXXX XXXX systems continued to billing me after I paid a full amount for account # XXXX that I paid total amount of {$80.00}. They sent me a second bill for the Amount of $ XXXX call them to discuss why they never make any credit for the first billing if I made the full payment for this Bill but it was very difficult to speak with them and I left a voice mail. 
I was waiting to heard from them to asked about the checks ( # XXXX & # XXXX ) I sent to them to paid the first bill. 
I never heard from them. Few months later I receive a bill from a Alliance one a Collection agency. 
that still has the wrong billing because they still want me to paid a partial payment I had already paid. 
I spoke to many different persons from the alliance One collection agency about the discrepancy in billing in which XXXX of the checks were missing. they always told me to call in two weeks because they need to discussed this with the XXXX XXXX systems Accounting department. 
they continued to ignored my complaint about billing and want me to paid again for the amount I have already paid. I told them that I will not paid anything else until they fixed this discrepancies. 
These are the names of the people I spoke from alliance oneXXXX XXXX - XXXX XXXX XXXX- XXXX XXXX XXXX XXXX XXXX XXXX XXXX XXXX, Finally they denied to make the adjustments in the billing and told me that I have to fixed this issued directly with XXXX XXXX Systems. IN ADDITION THE " ALLIANCE ONE " TOLD ME THAT THEY HAD ALREADY REPORTED MY PAST DUE ACCOUNT TO XXXX, XXXX AND XXXX. 
I trying to reach XXXX XXXX XXXX with no luck. 
This is the reason I need the Help of the Federal trade commission to fixed this problem. 

EXPLANATIONS:1. XXXX XXXX systems sent me an invoice # XXXX on XXXX XXXX, Charge me an amount of XXXX. I sent a check # XXXX for the amount of XXXX dated XXXX and posted on XXXX ( see attachments of XXXX record ) 3. They continued to sent me an invoice date on XXXX XXXX for the amount of {$80.00} without posted or applied the check # XXXX that make payment of {$40.00}. Balance should be only {$40.00} at this time. 

4. Again In XXXX XXXX you sent me another invoice with a balance due of {$80.00} ignored payment of {$40.00} in check # XXXX to received a revised invoice with the correct balance which supposed to be {$40.00} that I did n't receive I decided to sent you a second check # XXXX for the amount of XXXX dated XX/XX/XXXX and posted by the XXXX on XX/XX/XXXX ( see attachments of XXXX record ) In check I wrote an explanation about the payments I made to this account and it is clear the I told you that balance was {$0.00} ( XXXX ) see attachment6. You continued to sent me a bill on XX/XX/XXXX said that the balance still was {$80.00}. In addition there was another invoice you sent me # XXXX for a balance amount of {$150.00}, that I was going to pay but I decide to stop to make more payments until I received a revised bill that shows the XXXX payments I made to the invoice # XXXX. I was waiting and finally what I receive was a bill from a collection agency " ALLIANCE ONE ' on XXXX XXXX. 
8. FINALLY " ALLIANCE ONE '' is billing me for XXXX accounts for the original amount and plus they want me to pay interest % as well.As I told you I was discussing with them that there was a payment never was applied to the Account # XXXX and as a result of that I not make any more payment until this is fixed.