waiting for refund 2 mths

I app**** for a R55 top up contract and was incorrectly given an open line. When I queried it I was told they would correct and was given a new number and account no. This happened begin August. I was debited on 20 Aug 2015 with R 650 odd rand and Dominique promised me a refund. Then a few weeks later I went in again and she told me it was authorised and my account would be credited. Nothing yet. Last week sat I went in again. The old lady promised me she would sms me last Sunday which did not happen. I went in on Tues eve again and Dominique promised again to get back to me. I sent sms's everyday with no response. I am still waiting....