Horrible Service/Don't care attitude

<p>Having been a client of Autopage, now GloCell, I'm highly irritated with the horrible or rather non-existant service I'm not receiving. They choose to send me letters of demand for an account that I'm paying, and choose to ignore the endless proofs of payment that I send to them to go reconcile my account. I've been trying for the last two months to get them to sort out the mess, instead they choose to ignore me and keep on sending letters of demand. How many months before they resolve this???????</p>