Poor service

I feel so failed by african bank. i have deposited money into their "old" standard bank account which i have been using from (2009) provided by them...and was not aware that it was closed. last time i used it was in April 2023. the money was received, then 7th August 2023. I have sent them all documents required to allocate the funds to the credit card. up to today, the query is not resolved. i am not sure what to do anymore... one of the manager did say they used to have the standard bank account. this is affecting my credit score and they seem to not care. i do return call as they phoned while i was in meetings. problem solving is 0% compared to other banks