Paid Up letter

I have paid up my personal account as the amount requested on the day I queried a settlement balance.<br> <br> I am now told that there is a 45 day waiting period to receive my paid up letter. I find this totally unacceptable as the money is clearly reflecting on their side I cannot see what the hold up is. I need that letter urgently and no one can help me. I have called 3 times after which I keep getting told to call back in 48 hours.<br> <br> Can someone please give me a reason that makes sense as to why I cant get it <br>