Not getting paid up letter

I must say daly credit corporate has the worst service ever... While u still owing them they call u every day, email u everyday but once u have paid they are done with u. I settled my account with them on 10 June and I was told that I should wait 6 to 8 weeks to get my paid up letter till this day i have not received my paid up letter i call them everyday for it and everyday it's a different excuse and all of sudden they don't know the time frame for the letter while I had to wait 8 whole weeks for it. Everyday I call I'm told they are following up, i am so frustrated with them because I need that letter and I need it now!!!!