Yes they can. I read somewhere that they do not require KYC. In that case, they can not ask for it. If they have intentions to trick then they can do it easily. Who will verify that they are not telling the lies.

There are cases like this:

OP could have the valid KYC
= couldbet verify it using whichever tools they have and know that it's valid but they hide the truth

How are you going to justify this?

I would say this:
Can OP provide the tx of the deposit?
If he can then sure he deposited the money. And in that case cloudbet can just send the BTC back to that address. No verification no KYC needed.