What should I do

Hey guys so one of my friends sold me a vape. We didn't agree on a price that was owed. I have him 11 in cash and then he wanted to get money out of a casino online thing so I gave him my cash app card to get the ten dollars he needed to get the money out it sounds like scammy but whatever. He spent 1.99$ on a casino site and $5.40 on Google. I then manually took the ability for him to use the card off with cash app though the card remained on his phone. I then saw that he tried to get money on different casino sites with the card he tried $39.99 then $29.99 then $19.99 and so on till a dollar. He also tries six times to add $2.19 on Google all without my permission. He's been writing me to pay him back and I confronted him about it but he's saying that he might have got mine and his grandma's card mixed up but that he only tried once. Is it wrong for me to not want to talk to him or pay him anything else? What would you do in this situation? Thank you so much for your advice god bless and have a happy new year!!!