Dstv voucher

On the 5th of April 2023, I passed the garage and enquired about a voucher for petrol that I had from dstv worth R150. I was told to download the 1engene app and try retrieve it. When that didn’t work I then told the cashier to leave it and I paid using my debit card. Because I am regular at that particular garage, when my brother in law passed this morning of 13th he was confronted that I had not paid for my petrol that instead I had paid my dstv account. When I went to the garage I to find out what was going on. I found out that the money that I supposedly owe has been deducted from the petrol attendant that was assisting me on that particular day. The issue is still not resolved and it has been time consuming and irritating and above all embarrassing!!!! To be accused of it not settling a bill of a mere R150!!!!!!!