Casino does not pay winnings (reasons and problems)

Hello, I am almost new to online casinos, before that I tried a couple of casinos just for fun, lost and that's okay. I found out that the casino holds all sorts of tournaments, decided to take part in a small one at the Columbus casino. I deposited 300 euros, took a 100% deposit on the first bonus and went to spin. One slot is quite boring, the rules do not say anything about the ban on playing several at once, I opened 3-4 things and caught bonuses for myself, lost more than 100 euros (for first place in the tournament 80). I played like this for about 10 hours, then went to bed, and when I woke up, I saw that my name was not on the tournament list. I asked what was the matter, they answered that I broke the rules, when I asked which ones, they brought
34. USING STRATEGIES
We reserve the right to suspend, revoke or cancel any payments or winnings related to bonus funds received from the Company (points, bonuses, etc.) if we suspect that you are trying to abuse them. And also in the event of using any strategy or strategies for the purpose of guaranteed earnings, both with and without the use of bonus incentives.

They told me that I used a strategy to win the tournament. I don't know what a "strategy" is in a casino and I think that ANYTHING can be signed under this idiotic rule and anyone can be banned. I said that I didn't want to play there anymore and asked for my deposit of 300 euros to be returned. Naturally, they refused and kept repeating this strategy over and over again. They said that they would call. I waited for the call for 5 hours, it made no sense, they kept telling me about some cosmic strategy, and I kept asking how I should know what is considered a "strategy" in your country, that I am a psychic and should have guessed? And that the rules clearly say nothing about banning playing in multiple slots. They replied that "those authorized to resolve such issues" would write to me by email tomorrow. Naturally, no one wrote and, judging by everything, no one is going to write. The support team feeds me with empty promises that someone will write to me on Monday. You can wait for years like this. I think that Columbus are thieves and scammers who can sign ANY of your actions under a vague rule.

Jokker Ma wrote: Interesting...As soon as the balance of the game fund goes into the plus (your deposit is withdrawn, the game is played with the casino's money), the casino starts kicking up a fuss when making withdrawals...doing various tricks. They know how to take money, but they really don't want to regularly pay the player for his hard work.... And famous companies don't want to....They write back: We were unable to withdraw funds using one or more methods registered on your account. Although for several years deposits have been made from the same payment systems (cards, electronic money..). Things are moving towards my slow expulsion from the establishment....)

Jokker Ma wrote: I collected a new package of documents (photo of passport, confirmation of registration, confirmation of wallets (that they are in my name) sent by email + an hour in the chat.....And the withdrawal is stillopen))