Woolworth failed online purchase with Gift card, now they say insufficient funds!!!!

I've just tried to buy on the Woolworths app, using my Capitec Mastercard and a Gift card. For some reason, the transaction failed an all items are still in my card. When retrying the purchase, re-entering my gift card number details, it now says insufficient funds!?!? Taking my money, without a purchase being made.

I phoned Woolworths now, and when explaining my situation, and giving my ID number, she says this is not a Credit Card transaction, which I have mentioned to her, I'm using my Capitec Card and a Gift card, and then she put the phone down. VERY BAD SERVICE!!!

I NEED THIS SORTED ASAP.

Please can someone phone me and explain. *** Madre de Bod