atm transaction dispute for over 5 months

I was overseas and used my cheque and business card for cash withdrawl on two occasions money was not dispensed so i lodge Atm transaction disputes, one transaction on 12 may and 02 july was not successful, i lodged the dispute, they credited my account with that transaction money and after few weeks they debit my account again saying that money was withdrawn along with atm log file

but both times there were 3 transactions same time and same amount and they only check 1 from those transaction saying it was succesful

i have sending them forms, calling and emailing them every week but still both of cases not solved as yet, i dont know what to do