What do I have to do to get my money from you?

I closed my account on 19 October 2017 with the call centre. The case no. ********** 6. As there was a credit balance in the account of R310, the agent sent me an sms for Send-iMali with an OTP to take to an ATM to withdraw the balance of R310. As I was going overseas the next day, I never went to the ATM and by the time I got back, the OTP had expired. I tried getting a new OTP by dialling *1220*001#, but that didn’t work - it says that there are no available transactions. I then called the call centre on 07/11/2017 and they told me to go to a branch to sort it out. I went to the Dainfern Square branch on 18/11/2017 and I was told that the branch couldn’t sort it out and that I had to call the call centre. I phoned them from the branch, but wasn’t able to resolve the issue. A staff member at the branch took a photocopy of my statement and my phone number and promised to call me on Monday 20th November, which didn’t happen. I then phoned the call centre again on 25/11/2017 and they asked me to email you with my case number from when I first closed the account. My query was still not resolved so I called the call centre again on 08/12/2017. I still have not had this resolved.

R310 isn’t a lot of money and I’ve probably spent most of it on cellphone calls, petrol driving to the branch and time. But it’s the principle; it’s my money. Please can someone have a look into this so it can be resolved

Thanks so much