They accused me for create multiple accounts which i didn't
Unfortunately, I dont think there is much you can do about it. These gambling sites use automated systems flagging accounts for suspicious activity, which is fair, but it means mistakes happen sometimes. But these are rare cases in my opinion. Still, thats the bargain we strike for using their service.
Have you tried reaching out to their customer support and explaining the situation? Maybe someone else from your household used the platform, so you shared the same IP address?
Yeah, and it's rare that casino's are going to show proof here on the reasons why they flagged the account or how they caught the user with multiple accounts. And they have sophisticated tools to know that indeed it's one and the same user with multiple accounts like IP Address, the machine it uses, the OS and others.
So the it's up to the OP to provide proof that he is not using any other accounts. It could be the someone from his household could have created another account and so obviously it will be caught by Shuffle.
Or if he wanted to pursue then have a 3rd party to meditate things between him and the casino.