Smok TFV12 Prince P-Tank Coils (3 Pack)

My device has max capacity of 80w and pack that works on 80 and beyond was sold. I have showed my device before buying one the store and I was ensured to bring it back if it doesn’t work. I went there after two weeks as I already had a previous coils and I bought it as a new supplies, but store person said they cannot take it back. Person who sold me was apparently the owner of the shop, so I said this guy to pass this message to owner but never received any call back yet, and I am stuck with this wrong version of coils.