Tim Hortons review: payment

I went threw the drive thru on Oct 4, 2019. Had all intentions of using a Tim Horton's gift card. The employee swiped my gift card and the card is not working, so I gave him my debit card. I called to check my balance on the card and the remaining balance was the amount that was deducted from the purchase. So basically my gift card transaction went threw and my debit card transaction also went threw. So I was double charged!