Standard bank Customer Services - non existent

I requested a settlement letter from the bank for my vehicle on the 26th August, which was paid and settled that same day. I mailed the bank with the proof of payment and instructed them to not debit my account on the 28th as the vehicle had been settled. They app**** the payment to the account, but did not settle the balance and still proceeded to debit my account. I am beyond ****ed off as you would not believe the position, they put me in with me not having access to my money. I ahve mailed numerous times requesting the funds be returned and the vehicle account closed. I have not received a single response. First opportunity I get, I am moving my bond, my car, credit and current accounts to Capitec Bank. This is the most pathetic customer service ever....And I've been a client for about 20 years!