lack of service, interest in their clients

Seems I only get assisted after posting on here, second time now!!!! I've been waiting to be credited the amount of R639 since the 01 Jan this year. After various calls, the latest being 12 Jan, I was promised to be called on 15 Jan with feedback, NO ONE CALLED. The guy I spoke to was Mkoskhona from customer service. I WANT MY MONEY AS PROMISED! I also opted not to renew my contract and cancelled on 18 December 2015, THIS ALSO HASN'T BEEN DONE as of 12 Jan when I last followed up. I REFUSE TO BE BILLED THIS MONTH DUE TO YOUR INCOMPETENCE AS USUAL. Please sort out both these issues asap and I expect prompt feedback. Case number for cancellation ***0