Thanks for admitting it, can you accept payment for the levels you got? So he doesn't have to pay the full amount since this is kinda a sticky situation. If you agree to that it would be muchh appreciated if not he will have to pay the whole thing.
That's what we are here for, but wasting our time instead of admitting it looks bad. We just try to get to the truth that's it. We aren't bias in our decisions hence he still has to pay you if you don't accept payment for exp gained.