I had XXXX work at XXXX XXXX of XXXX in XXXX 2014. I paid my part in full before the procedure. They failed to do the insurance paperwork and they kept sending me bills for the part covered by insurance. I contacted them and the apologized and gave some excuses about the issue ( which I do n't think was the case ). 

After a while I received a letter from Debt Collector. 
I contacted debt collection agency and the dentist office to resolve the issue but it did n't work. I contacted the insurance company and took care of the issue myself and had them send the doctor the check. 
Insurance company record shows that the doctor has cashed the check. After receiving calls from debt collector I contacted the doctor again and doctor 's secretary apologized for the problem affirming I never have outstanding balance. ( all email correspondence attached XXXX But the debt collection agency keeps calling me and they say their client XXXX dentist ) says they have never received any payment, and they continue their harassment after a year.