Made a deposit on November 25th, still no money on my account or refund

On november 25th I made my first deposit to Snabbis casino. I deposited 20 euros using the first deposit bonus. Unfortunately it wasnt added to my account so I immediately contacted support asking about this. They told me it was probably just delayed. I waited and waited but 2 days later it still wasn't in my account even though the money was booked off of my bankaccount immediately. I contacted support again and they told me that the transaction was cancelled and the money should be back in my bank account within "some banking days". So I waited again for the money to appear in my bankaccount. On december 16th I still hadn't received my money back so I contacted support who told me they'd get back with me the next day which didn't happen. When I contacted them again, they told me to be patient but it's been almost a month and I dont feel like I am being taken seriously. They keep sending me away with empty promisses and don't help me in finding a solution. I just really want my account to be credited or proof that the money has been sent back to my bankaccount.