paid up letter

i had credit card with FNB, then my account was handed to multiple lawyers, , last lawyers who have my account is Daly credit corporation, been communicating with them and paying my account bit by bit until i requested settlement letter from them, the gave me settlement amount and assisted me to to settle the account, till today am still waiting paid up letter from FNB am not getting any response send them couple of email to ***, cc some of the management but none of them bother to get back to me made couple of calls but i was told that department doesn't take calls, what kind of department is that i need FNB to contact me on *** before close of business today and let me know when am going to get my paid up letter their lawyers has been harassing me with payment i made the payment why now has to struggle to get my paid up letter and the must go and update credit bureau as soon as possible, first time ever receive such bad service from one of the biggest bank in south Africa