I believe this is what you are looking for:

https://bitvest.io/support

but it is strange that they suggest people to create a new corner in case they no longer have access to the current account so that the person can enter and expose their problem in support, this is very strange, would it not be simpler if they had a chat online or an email to make it easier for people not to have to create a new account just to contact support, well I really can't stop being surprised by so many strange things that having seen these last few months in many casinos, if you also observe you will see that OP does not it's been active here on the forum for a long time, it's been more than 7 months since the OP disappeared, that's why it's very difficult to trust this casino in my opinion, I say it again because there's no guarantee that the casino is still OP

anyway use the casino but be very careful, in case you manage to solve your problem I also suggest that you post in this thread and mention how long the support took to answer you and to solve your problem, this will be very useful information for people , at least we will know how their support is working, something that I also found strange and that I didn't see where their tos is, maybe they don't need to have one, which is very strange. Anyway, there are many strange things that I have seen