Deposit but unable to withdraw

I deposit 500 yuan for the first time, and it took less than half an hour for the account to make a profit of more than 100 yuan after I traded as they instructed. Then I tried to apply for a withdrawal of 613.5 yuan from the account, and it was soon received. The next day, at the instigation of them, I made another deposit of more than 13,000 yuan. Seeing that the profitability of the account was quite good, I deposited another 15,000 yuan. Under the instructions of the other party, I basically earned more than loss. After more than an hour, I tried to withdraw the capital of 28,000. The withdrawal application was approved, but the funds didn't arrive for a long time. The platform said that the account peak was not enough, and I must increase the funds to raise the peak before the withdrawal can be made. After that, I submitted an application again, which was directly rejected by the platform.