As you were already told via support, your account was permanently banned from Rollbit for very obvious market manipulation. We consider this abuse of our trading feature.
Can you briefly explain what sort of Market manipulation he did? If he got the skill to trade and make money from $100 to $67k, that's not a reason to ban a user.
If there is a valid proof of him manipulating the market, I am sure you would love to share here with everyone.