Hm, I've never heard of this wallet, I can't access their website, and it's not easy to find much information about them online. Maybe there is a legit online banking, but this is a fishing website? Or maybe there is no legit Viserbank project. Unfortunately, I think the op was scammed. Not being able to withdraw and not being able to reach support are likely to mean that it was a scam, and probably an exit scam, considering that the website is now offline.
That's why it's important to remember that centralized services are unreliable and risky, even if they look legit at some point.