One thing I normally do before I get registered on platforms is to take out time to read through the terms and conditions applied irrespective of the give away bonuses or anything else to hold onto for more clarification. Most times these bonuses are just to get at unsuspecting participants to get registered and once they do, boom ! They are back to their initial plans of ripping out people through their cons. OP should have read through the terms and conditions before jumping in and making deposit. These are the Minor mistakes made in respect to getting onboard a platform as a result of bonuses and give away without reading through to know the clause involved in the give away and bonuses.
That's exactly what everyone should do if they really care about their money and don't want to give up on them. We all understand that if a casino advertises something but doesn't follow it, it's their fault, but can we actually do even if it's their mistake? We can do nothing except making complains or creating accusations against them.
So the only and the best solution to not getting into such issues is simply to read the terms and conditions of a casino right at the time of registration or just before you are about to make a deposit with them to gamble.