Can't get a simple settlement letter fast!

Extremely frustrated with vodacom! I settled my contract early in August. I then app**** for credit this month only to be told I don't qualify for credit because of bureau expense. When I check my bureau report, I find that not only did Vodacom not change my status to settled, they set my installment amount to my settlement amount!!! So it looks like I have no surplus available! On top of that, when I call in, I'm told it will take 3 business days to get my settlement letter, delaying me even further!!! Why can I not get my letter immediately?? You've had your money for months now!