Apple Gift Card

I went to the store to buy an Apple Gift Card and I put in $15 worth of money in it, I unsealed it and then used my camera to scan the code and when I did scan it, it said that $15 of money was added to my balance but it also showed that my balance was now $0.01. I’ve already restarted my phone plenty of times to see if it was a bug or something but still no fix. Can someone help me?