FNB wont reimburse ATM withdrawal not received

On the 3/11/2022 i made a ATM withdrawal at FNB OR Tambo airport...before i could take the money it went back into the ATM...no slip was given as it was a cardless transaction...my account was debited for the amount...i contacted telephone banking and they advised that i need to complete and submit a card banking dispute form, that they emailed to me...this i did and emailed through to fnb disputes on 7/11/2022...as i had not received a reply by 16/12/2022 i sent a follow up email...on 30/12/2022 finally a reply from FNB saying they are sorry they cannot help me and that i needed to contact telephone banking...How frustrating...its not even worth chasing this R500 anymore...FNB you are welcome to keep it...