The worst service

I went to Engen Chiawelo Convenience on 13th March 2022 (Sunday) to get some petrol. On the day for some reason my card was declined, I'm not sure if it was a network problem or a bank error because I could not withdraw as well. I was assisted by a petrol attendant named Tebello who insisted that the transaction will be reversed even after I had shown him on my banking app that the transaction went through. I ended up paying the R200 petrol cash. Monday 14th March I went back to the petrol station around 2pm and was told the 24hrs is not up so they cannot assist. I spoke to a lady at the till, I don't recall her name and she told me that she confirmed with her manager that I should come back the next day for a refund if the funds are still not reversed. 15th March I go back and still the funds are not reflecting. I have my bank statement with me and the slip I received that I made a cash payment. Already upon arrival the service was bad, I had to explain again to the manager named Elidio. He was not helpful and he didn't keep me informed, he just came and told me to leave my details and they'll contact me, he has to contact FNB as they handle their transactions. Today 3 days later my issue is still not resolved. I got a call from Elidio well today he said his name is Lungisani. He said he called FNB but he couldn't stay on the line for long. His attitude firstly was that of a person who is not willing to assist. He had no knowledge on how to read the bank statement to a point that I had to take a copy on my side as well to explain to him what's happening. He said he will call me and did not have a turn around time as to when he will contact me whenever he has feedback. Honestly I am frustrated because I don't live in that area and I had to drive for the past days to follow up on my query and I'm not getting assistance at all. I'm really disappointed because I always get the best service from Engen Radebe Motors. This is just uncalled for. Maybe I should try Shell or Caltex. I hope this issued is resolved with the utmost of urgency and that I will be compensated for all my time and petrol that I have wasted trying to resolve this. You should consider hiring people that are great with customer service and who know what their doing.