160,000 USD cannot be withdrawn

I am a client of onepro. The former trading platform ebro merged with onepro and transferred all our accounts to the latter. I have been trading with onepro for a month now and would like to request a withdrawal. However, onepro is using various excuses to reject my request. It said it had not received the money from the former platform and frozen our accounts. As a company, you didn't receive deposits but still accepted the client's account, and all of the deposits and transactions were on record. I think the two platforms are colluding to defraud us of our money. And I have lost a large amount of money. I will have to take legal action if the problem is not solved.