TRS Limited LLC Collection notice for product cancelled Springfield Illinois

After an initial purchase and and aditional charges made to my bank account.  My bank did an investigation and found the original charge to be legitimate, which I had no problem paying.  I called TRS Limited LLC and requested that they cancell all future shipment of their product, which they agreed with no further billing.  I received another shipment about two days after my phone call and promptly wrote "return to sender" on the package and returned the products the same day.  

 I never received another bill. This was about four months ago.  I received in the mail yesterday (7/24/2017) a collection notice from CCB Credit services for the amount $139.97 with a POBox address  POBox 272 Springfield IL 62705-0272.  I didn't recognize the TRS Limited name so I did an internet search and the first information to come up was this site and the many complaints very similar to my experience.

with that said how do I really dispute this claim and get assistance to fix this scam attempt?  Will delay any payment until I can get some feedback.