TRAVELSTART DOUBLE CHARGE ON MONEY AND BAD SERVICE

I made a booking with Travelstart for a flight from Johannesburg to Windhoek on 23.11.2022. I have received an invoice for Total amount as per quote on site to the amount of R5374.00. The Breakdown is: SAA - R4859.24 & Travelstart - R 514.76. However Travelstart double debited my bank account with R514.76, thus charging me R1029.25, instead of R514.76. I contacted my bank FNB to reverse the double charged amount. They advised as the debit was done over 2 days: 25 & 26 November 2022, thus they could not do so. They advised that I must contact Travelstart directly to reverse the overcharged amount. Which I have done on 26.11.2022 on their site, explained what happened and supp**** my contact details: email address & phone number. To date no-one from Travelstart has contacted me and the amount still not has been refunded to me. I also have not requested the automated check-in, as I also handle my own check-in and choose my own seat, this amounts to a further R158,00