Reversed card transactions

I logged a complaint that a certain gasoline station debited me 3 times the amount of R555.20, and on the 4th I tried to pay for my for my Childs books via POS and amount of R1285, it did not go through, the receipt said the transaction is reversed, the funds have not reflected in my account to date. Uber Eats reversed R71.80 in my daughters account, the funds are still not reflecting in my account, I am not getting any help from FNB and this is such an inconvenience.