Receiving no feedback on ***** committed in November 2017.....no replies to emails

I am dumbfounded by the lack of client service and feedback from Nedbank with regards to ***** that was committed on my credit card account. I've heard of FNB taking a week to pay back the monies. I logged the issue on 15th of Nov and the only feedback I got was a phonecall to tell me they have 45 days to sort it out....really....now nobody gets back to me.....this is almost a thousand rand...not sure if they think its not a lot of money but to me it is...I had to borrow money to get through November. I've been with Nedbank about 25 years and seriously considering leaving!!!!!