Is it legal and allowed for the platform to charge deposit

The account withdrawal of 268,888 yuan was rejected by the platform later, saying that my bank card information was filled in incorrectly. I found that the bank card number was wrong. Due to the security mechanism of the platform, I needed to pay a deposit of 268,888 yuan equivalent to the balance in the account. After I paid the amount and tried to withdraw money, the system detected that the third-party deposit was more than 200,000 yuan. It was stipulated that a single transaction could not exceed 150,000 yuan. The extra 50,000 yuan needed to be paid again before it could be withdrawn. Was the platform allowed to do so?