REFUSED TO PAY BACK DUPLICATED PAYMENT

I wanted a refund for car online advert . They refused and said they can only refund advert duplication which was also a case. They send me a refund form for the extra payment I made. EFT payment went twice . R649 +R649. Now they refuse to pay that extra payment.

Their First email : Kindly note, we are only able to refund the second advert as it is appearing as a duplicate. In order for a refund to be processed, the following will be needed from your end. Kindly complete the refund form attached below Kindly provide your bank statement showing the Auto Trader transaction. (For Accounts Department) Sincerely, robin lee cameron customer service AutoTrader.co.za

Their Second email: Please note that both the adverts have run a full 28 days , therefore we are unable to provide you with a refund. Kindly note that the below query was sent on the 4th January , however the refund form was received on the 23rd January. Sincerely, kiara jenkins customer service AutoTrader.co.za

I WANT MY MONEY KIARA,PLS DONT UNDERMINE ME