paid up letter for overdraft

I have paid up overdraft this month last payment amount of R500.00 i have been trying to get hold of the call center but they keeping on cutting my call or transferring me to the incorrect department, yesterday i called in and the g/man i spoke to advised that i don't have any accounts under my name, i advised that i have a revolving loan that i am still paying up and had a overdraft that was paid up this month , and i would like confirmation that the overdraft will be paid up, he advised that letter will be emailed to me and took my email address , but till now i have not received any email , i have tried to call but when someone answers today they keep on dropping the call...…….. i want this sorted out today