It looks like your problem has been answered by a wintomato representative.
You have been detected creating multiple accounts on this platform to abuse bonuses or cheat bonuses with multiple accounts having the same IP.
Even though you didn't provide any evidence at least your question has now been answered, are you relieved?
Cheating in any casino is prohibited and it is not recommended to continue to do this for profit.
Lately, there have been several cases like this where gamblers take advantage of bonuses provided by casinos by creating more accounts for the purpose of being able to collect or get even more bonuses.
Every casino must take firm action against cases like this because it is not only detrimental to the casino but also to the detriment of other gamblers who have to work hard to get bonuses from the casino.
I don't know why they did something like that, even though playing in the right game can provide more benefits than wasting time cheating the casino by only expecting a bonus.
Actually, problems like this are not new anymore but maybe their numbers are rampant now because crypto and fiat casinos online are growing faster. Creating multi account's are a basic way to take advantage of the bonus but I doubt those who attempt will be successful. Before they can think of it, the casino already knows this and have prepared different measures to combat the issue.
If you are sure to your self that you are gambling in a fair manner then there is no need to worry about this problem. You won't be affected with it and you can always withdraw your bonuses once you won them. The main reason why someone can abuse the bonus is because they can't afford to play using their own money.