debit card reversal

I have purchased goods on 7 April 2016 at Pep ohrigstad of R677. The next day I saw on my bank account that the amount was put through twice! I went to the branch manager Mavis and she told me I had to bring bank statements so that she can send it through to the finance department. I did it. I was informed that the money would be reversed within 24 - 48 hours but still nothing show in my account. Then mavis paid me R670 cash and told me if the money is paid into my account I have to bring the R670 back to her. I was at the branch today and she need statements again. The bank statements cost me a lot of money! Customer care however told me they can't help me. I phoned them on 13:38