Using any fake identity is not advisable at all, even if you are just a small time gambler you should still not practice this because you can still face problem later on.
Contacting with the support is easy for Roobet since they have this active support to handle your problem but again, if your problem is KYC I believe they can’t help you that much and you are left with no option but to comply.
Big problem here is the fact that so many gamblers don't feel comfortable sharing their contact details, but still want to play here which is why they end up providing fake details in order to tackle both issues with one stone.
They don't really think about any issues that they could face in the future related to those fake details and end up whining later on when they end up running into such issues.