Sanuki Corporation review: Refused to refund my 1000$ after failure to get the car from auction

I wanted to buy VW golf from auction through Sanuki Corporation and they asked for a deposit of 1000$, I deposited the amount on 30 May 2023 three, after days of trying to get the right car they failed and asked if I can deposit more money to secure the bid, I refuse and ask for a refund since 26 June 2023 and they have been refusing to refund my money with a statement that their bank account has been frozen and the bank is holding my money. Please assist