Debit reversal.

In the last few weeks I had a few problems. Reversing a debit, a policy I cancelled but the they still debited my account. When I decided to buy electricity via standard bank app. Two times the app gave me a error after clicking pay and the third time it also gave me a error. But 2 minutes later I got 2 sms. 2 payment went off my account. I immediately contacted standard bank and told and they told me that they will look into it. Both queries were resolved within a week.