Why change my cash to a gift card

On the 12-01-2025 i place an order for two cellphones from their website and pay the transaction through my bank card. the transaction went through successfully. On the 26-01-2025 i send an email asking when am i going to receive my order because it has passed the delivery date, A response from Ridwa, was that there was a slight delay of my shipment, but the shipment has arrived, they 'll make sure my goods are delivered on the 31-01-2025 which was Friday. Tuesday the 04-02-2025 i receive a respond after asking for my order, The same person send me a message informimng me about her sincerest apologies for the situation regarding my purchase, after they escalate to their Shopping team, they were advised that they were unfortunately no longer able to supply the item I bought, because they were removed all mobile phones from their website. They will process a full credit for the items i have paid for. I ask her to refund my money because i dont understand what they were trying to tell me because they failed to deliver it on Friday now they send me a messega to tell they no longer have the item from their shop. On the 04-02-2025 i receive an email notifying me about a gift card to the total of R2398.00. On 06-02-2025 i send her/him an email informing her/him that i dont need a gift card because on my account with Hyperli there is no option to convert that gift card to cash where i can withdraw or transfare it to my bank account. i didnt get a respond to her/him. On the 10-02-2025 i send a message to their email address informing them i dont want a gift card but my money transfared to my bank account number which i paid for the items purchased. The response was they do their best to resolve my query. They are not saying anything about refunding my money i paid.