Product: Debt collection

XX/XX/XXXX XXXX XXXXXXXX XXXX XXXX XXXX XXXX contacted me to set up XXXX phone and integrate it with my customer management systems ( XXXX XXXX XXXX XXXX  ). I only needed and wanted 1 phone line- they required me to have 3 stating i can use one for fax, and one for general mailbox. XXXX advised it was XXXX XXXX per additional extension if i agree to 4 or $ XXXX per extension if i agree to 3. I chose 4. XXXX also advised XXXX XXXX integrates with XXXX XXXX XXXX XXXX  and he sent me XXXX videos as verification. XX/XX/XXXX the account was activated. I could not set up voicemail. no one would take my call. they made me only use an email chain and sent me " how to '' which did not work. " We are aiming for 100 % satisfaction, but if we fell short, please let us know! '' - I asked for help with integration as they promised i would have " onboarding '' which would assist with that. The person who onboarded me said it was " odd '' that it would not integrate with my salesforce and someone will look into it and get back to me. no one ever did. causing the phone system to not work as sold- the phone is supposed to ring... .find who the person is via my salesforce customer managment system, and populate that account on my screen -- -the only reason i went with XXXX. they could not get it integrated and they would not cancel the contract. now they are charging me {$4400.00} for something that was quoted at $ XXXX. I asked on XX/XX/XXXX to cancel and XX/XX/XXXX to cancel, XX/XX/XXXX to cancel, XX/XX/XXXX to cancel, XX/XX/XXXX to cancel, XX/XX/XXXX to cancel. They have since farmed a collection agent XXXX XXXX to contact me and he is threatening lawsuits. His email says Caine Weirner law firm. XXXX XXXX said he noted the account as refusal to pay and exhausted all efforts. He called once, and emailed once. I replied all times stating that his client - XXXX  XXXX  breached the contract when they promised their software would integrate with salesforce and it did not. Therefore, I requested cancellation several times. I have NEVER given out or used any of the phone numbers from that service. I tried to use the service a couple times and could not due to needing to set up voicemails for XXXX different lines and no one helping me with how to do that.These companies are getting away with fraud by misrepresenting their product and then billing me over {$4400.00} for something i never was able to use and tried to cancel the same month it was activated. So maybe one month i owe- MAYBE! To charge me {$4400.00} because their sales person lied verbally and a couple wrote it in their emails - I should not be responsible to pay anything. I tried to work this out with XXXX XXXX- who advised " he is just sales. '' Then I tried to with their billing dept. Then i tried with their helpdesk. Their fake lawyers aka credit collection people send over snips of emails stating i agreed to things- then i reply with the conversation in its entirety and then the fake lawyer disappears. Then a month or two later a new fake lawyer calls and emails with the same nonsense. Oh i just realized a fake lawyer XXXX XXXX messaged me about balance being {$4200.00} - then XX/XX/XXXX a new fake lawyer XXXX XXXX messaged me saying pay {$4300.00} or else it will become a more expensive matter to resolve. Now the new fake lawyer, XXXX XXXX is being nasty and threatening legal remedies.