The problem with your case is Rollbit doesn’t intentionally do maintenance to cause your losses that’s why it can’t be categorized as scam attempt that deserves to be -ve trust by DT.

Although Rollbit can show a good gesture to refund the damage since you are really affected however it’s not a must. You should use exchange rather than a casino on doing high leverage trading if you want a hassle free experience.

If there’s a lot affected with maintenance then you can file a strong case against them.