5x wagering requirements is insane, but they did mentioned in their terms of service, so you can't blame them even it looks unfair to you. This is the reason why all users need to read the bonus rules, if you've read the 5x wagering requirements you can ask them to lower it, if not you can just choose other casino which the rules is more friendly.
Welcome to scam casino. A lot of us have gone through that experience where users wouldn't really deposit anything if they just knew that the deposited amount is bound to lose.
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Coinbox1, you can leave them negative feedback if you think they're scam.