Poor Service delivery at the end of payment.

In response to my review, I've been contacting both Blake and Associate and Cell C, requesting for a paid up letter since April, However their call center can't seem to assist me. There response i keep on a getting is now like a song playing over and over. "we sorry for keeping you waiting, we will request send an email as urgent for your paid up letter, once we receive it we will call you." How urgent is that if one has been calling since April and still not being assisted, I wish they could understand and email me the paid up letter, as i did finish off with paying their outstanding balance.