Not happy at all

I stopped to refuel with R50 thats all I have and when I proceeded to pay the attendant told me it whas R350 and I told him no I asked for R50 now I don't have that kind of money. I had to wake up a family member to help me with the money and paid for the fuel but now I lost that money wich is not my fault so how can I claim back for this I'm not leaving it there until my satisfaction has been met.