Duplicate transactions and Absa is not refunding me

Absa deducted R6000.00 and R1395 double from my account,this happened on the 2 May 2025,I went to the bank,they told me to go to the merchant to get a letter confirming that I did not do duplicate transactions,the times are the same of the duplicate transactions,the merchant at 1 place confirmed that I did only 1 transaction,the other merchant went quiet,I sent an email to the bank asking them to reverse the monies,I am not getting any response from the bank,the complaints department will only come back to me after 1st week June 2025.