Double deductions

I truly believe Capitec is the best bank is SA. But today I have a problem that they can not fix. On the first of May I bought electricity using my Cellphone app. but I did not receive my token. So I wait for a while. After a couple of our hours without receiving my token I made another transaction. This time desperate for electricity. I receive my second token immediately. On investigation I notice that that the money was deducted twice but I only receive one token. When I realized it I went to the bank and they said, they can not give me my money back but they can give me a new token. The token they give me give a "used" error. So I lost R1800.