As a customer, my expectation would be that I would eat it, and I wouldn't pursue anything.
If I were the operator, I would offer some sort of compensation, probably a credit. Years ago I used an operator that on two separate occasions gave me a full refund because of problems on a dive. I didn't ask for it--it was just given to me. Something similar happened just a couple years ago because of glitches on a guided cave dive--I was offered a partial refund without asking for it. I very much appreciated that customer service, and I have both used those operators again and recommended them to others.
If I were the operator, I would offer some sort of compensation, probably a credit. Years ago I used an operator that on two separate occasions gave me a full refund because of problems on a dive. I didn't ask for it--it was just given to me. Something similar happened just a couple years ago because of glitches on a guided cave dive--I was offered a partial refund without asking for it. I very much appreciated that customer service, and I have both used those operators again and recommended them to others.