Fashion Nova review: Can’t apply credit gift card and can’t cancel order entered in error

I was attempting to use the gift card that was given to me on May 28 and The discount field was not accepting the gift card number number and I contacted customer service to let them know and they gave me a very generic email that was of no help because they were asking for the order number but I didn’t have an order number because I couldn’t process the order with The gift card number I was given. I tried numerous times and sent numerous emails and then placed the order in error without the gift card number and so I tried to cancel the order within seconds of placing it and was told they could not do it and that I would get another gift card once the items I ordered were returned with a shipping fee. This will be the third credit that I don’t want from this company. I want to cancel this order or I want the gift card applied to it.