Double Debited

So on the 23rd December 2022 i go on to my CellC app to do and EFT payment to get over and done with paying my bills as it is the festive season and no one wants to worry about debits that haven't gone off and so forth ... So anyway the EFT was done the sms from my bank came through at that time of payment stating the money has been taken so I all was good in the world until 18:35pm again i got debited by Cellc do the same amount which is my monthly installment but yet earlier that day the payment was already deducted from my account. Worst tracking of payment ever.... CELL C I WANT MY MONEY!!!!! REIMBURSE ME FOR THE SECOND DEBIT OR WE ARE GOING TO HAVE SERIOUS ISSUES AND TO WHOEVER READS THIS FROM CELLC PLEASE GET BACK TO ME IMMEDIATELY