I received a bill 11 months after surgery. We pai...

I received a bill 11 months after surgery. We paid thru HRA. Get another bill next month. I call and say I paid. He said prove it. My HRA sent a copy of cashed check. Next month got a bill. I call and same guy says sorry didn't get any proof. Call HRA company and do a 3 way call. Sending copies AGAIN. Next month no bill? So I call and ask if it was marked as paid. He says NO. I said why no bill? he says' Were done sending bills for this" I said I paid this 4 months ago. He says they never got any proof. So now I faxed a copy of payment from HRA and I just called (10 days later) and he said it is not marked as paid....grrrrr