Product: Debt collection

In XXXX XXXX, I had a Permanent Change of Station set of orders for the XXXX XXXX XXXX. I had to move out of XXXX XXXX, TX to XXXX, XXXX At the time of the move, I called XXXX to cancel my internet service. At that time, they cancelled my account and stated that I did not have to return any equipment, and that my account was fully paid for and settled. I proceeded to move to my new station. On XXXX XXXX, my credit card account was charged {$140.00} by XXXX. I called XXXX to question this charge, and they said it was for unreturned equipment, which I was told when I cancelled my account that I did not need to return because I owned the equipment in question. The XXXX  representative confirmed on the phone this charge was in fact an error, and that the fastest way to fix the problem would be to put a dispute to my credit card ( XXXX XXXX ) company so that they would reverse the charge, which I did. XXXX XXXX had started the dispute process. On XXXX/XXXX/XXXX, the charge of {$140.00} was reinstated on my XXXX XXXX card. I called XXXX XXXX, and they had told me that XXXX said that the charge was for the unreturned equipment. I had called XXXX again, and they again said on the phone that this charge was not correct, and that I did not need to return equipment because I had owned it, and that I would be sent a refund for the {$140.00}, and that I should speak to my credit card company again to dispute the charge which I did. Approximately 1 month later, I called XXXX XXXX to receive an update on the status of the dispute, and the representative mentioned that XXXX and XXXX XXXX were continuing the dispute process. In the meantime, I still received bills from XXXX and called XXXX back, who again, on the phone, mentioned that I should not be receiving these bills as I do not owe XXXX any money/equipment. XXXX XXXX on XXXX XXXX, sent me notification that the dispute was resolved, and that XXXX would be crediting XXXX XXXX for the erroneous charge. A few weeks later in late XXXX, I received a bill from XXXX  for the {$140.00}, and a notice stating that the account would be sent to collections. I tried calling XXXX several times, and was unable to reach a representative. On XXXX XXXX, I received a notice from Credence debt collection service on behalf of XXXX for the {$140.00}. I called Credence and they stated that XXXX would not send a bill to collections if it was incorrect, and explained that the {$140.00} is valid because there is a delay in the last billing cycle when an account is closed. They mentioned that this bill was for the last month of service, not equipment as XXXX had been saying. This was inconsistent, as my monthly bill has never been in the amount of {$140.00}, and I was also told multiple times by XXXX that it was erroneous, and further XXXX XXXX had resolved the dispute with XXXX  which ended up crediting my account. Now my account is in collections when it should not be, I have an impeccable record of paying valid bills on time and it is not right that XXXX continues to charge me for something that I do not owe money on and that now they have sent it to a collection agency marring my record. Additionally, the collection agency was very supportive of XXXX, justifying their charge when it is in fact an error. Can you please help me clear this up, and clear my name from collections? I have been a responsible consumer and do not let valid bills go delinquent, and this is unfair to me as a consumer.