Unhappy with Rain service.

Good day, I have paid for a Rain 4G (R479.00) on the 26 July 2020. The problem is that Rain took twice that amount out of my Bank account. I have tried reversing the transaction and it won't let me. I have tried contacting Rain on Email and it has been 4-5Days and I haven't even heard back anything. My Bank also tried reversing it but it was unsuccessful. They said that I can only do it by getting in contact by Rain but it has been 4-5Days and haven't even heard anything. Please help me.