Petrol attendants ****ming elderly woman

I have been ****med twice by this Petrol Station, on the 25th of November I through in R200 petrol and then stopped at the same garage on the 27th of November to buy from the shop and again I stopped there on the 05th of December, and Daniel the petrol attended rushed to me saying my card declined the petrol I have thrown in on the 27th of November, not thinking clearly I said to him really and he presented me with a slip that stated declined, I said ok let me check on my banking app, saw that on the 27th nothing went through my bank and I then paid him cash. I stopped at the same petrol station on the 16th of December and this time the Petrol attended Jack rushed to me saying that my card declined with petrol I put in on the 27th and this time I blew my top, because I don't drive far every day probably 5 km a day and maybe every second day, so the R200.00 petrol I put in is for a whole month and never realizing to check the card number on the declined slip or anything or even asking them so how did I leave the petrol station if my card declined??? and this is not the first time that this has happened at this petrol station and this was the last straw of them ****ming a 78 year old woman of R200.00 and just wondering with how many other elderly people they are doing it with.