Sort this out ASAP

I bought a gift voucher of R800.00 at Worcester Mountain Mill Mall in February 2020 and when my sister wanted to purchase something end of June 2020 at Cape Gate the card said transferred. I didn't authorize anyone to transfer the money to a new card. Purchases were already made with the card where the money was transferred to at Canal Walk. No one can tell me why the money was transferred and I want my R800.00 back into my account.

I phoned and send messages to the manager, Anna at Worcester Mountain Mill Mall but I don't get any answers. She only says it was given through to the investigation department middle July 2020 and she can't get through to them.

It has been almost a month since I've written a review about Edgars. I only received an e-mail with a reference number to say that they've received my complaint on 25/07/2020.

What more must I do to get my R800 back into my account and who authorized it to be transferred in the first place. This is really *****.