But he wants them to recover/deposit the free spins that was lost, at the first time when the bonus was revoked by him then.
This is my first time to see a welcome bonus that automatically convert initial deposit to bonus balance. Somehow this is indeed unfair if you didn’t read the bonus ToS for that specific bonus.
It feels like your balance is trapped with x40 wagering requirements the moment you made deposits. The problem on this type of conflict is you already use part of your free spin and balance. Meeting the x40 wagering requirements is indeed your only choice here since the ToS stated that so. This request of yours seems fair for you and the casino to move forward.