PuzzleCasino - Verification is not possible / Support do simply not answer

I registered new to this casino and after a couple of hours I was lucky and got some winnings. I tried to withdraw my 988€ Balance, but I was unable to even start the verification process. First step you need to do is phone number verification, when I start the verification process I get an error message "Phone number verification not enabled". Of course I contacted the live chat and the guy told me everything was fine with the system, the problem was on the side of my provider, which is nonsense because I never had problems with that. One day later I tried again with the same result. Now live chat told me, they can not do anything and I need to contact support via email. I did. One day later still no answer, so I contacted live chat again, the guy told me he would inform the managers. But still 4 days later and after a couple of reminders I still got no answer from support. Not even an empty message like "we received your message", simply nothing. Live chat always tells me to write an email. It is frustrating. Why on earth do so many casinos try to avoid withdrawals? Now I have a 988€ Balance on my Account and no chance to withdraw it.