Allied Interstate LLC Debt Collection Complaint

Allied Interstate LLC Debt collection department,

Cont'd attempts collect debt not owed Debt was paid Ohio

I had cable service from - - that was contracted through - -. All billing for my cable service was received from -. I never had an account directly with - -. Upon the end of service, I received a bill from - that reads FINAL BILL more than a year ago. The FINAL BILL showed that I overpaid the account by more than $50.00. However, - - created an account after service ended and continues to send me fraudulent bills via collection agencies attempting to collect at first $230.00, then $140.00, and recently $98.00. On -/-/-, I contacted - via certified letter to dispute the debt, provided a copy of FINAL BILL proving balance was not owed. This collection company stopped contacting me after the letter was sent. Then I received collection attempts from - - - in -/-/- and -/-/-. Again, I sent a certified letter to dispute the debt, provided a copy of the FINAL BILL providing the balance was not owed. This collection company also stopped contacting. However, on -/-/-, another collection company called Allied Interstate has sent me a letter attempting to collect the debt. Will all collection companies across the USA attempt to collect an alleged debt on a fraudulent account for the rest of my life? Will I be required to send certified letters every 6 months when - - sells the fake account to another collection agency until the statute of limitations passes ( another 5.5 years from now )?