Can't close loan, bad service

I have been trying to close an revolving credit account since last year and I am having no luck, I called in and was told to go to the branch so I did, Meyerton branch, they refused to accept the reversal of debits I want back because I canceled the account, they can't have it in their cost code, literally, that's what they said, and still I'm paying for it 2 months later, I called in again and asked to be called by the branch as a matter of urgency and guess what..... No call...... I've been with standard Bank for more than 15 years and this is how I'm treated..... I can't even get a loan closed and a refund for the monive payed in extra after I was told the account would be closed..... Branch even agreed that it should have been closed last year but was never and its March now and still going..... Such bad service.....