Bibox exchange is not allowing me to remove my crypto off their exchange, what to do?

Had this issue for almost 3 months now. Had some crypto on Bibox exchange from a long awhile back, decided to change into Ethereum and withdraw the Ethereum off the exchange. I am aware of exchange risk, and "don't keep tokens on exchange", etc, so this is my fault. I've had tickets open for months now, been very polite to them (they've been polite but keep the same mails)

Every time I check for any update, it's the same response, along the lines that they will conduct some sort of technical investigation, but nothing ever comes out of it. It's a pretty straightforward movement, I've done it before many times, perhaps I made a mistake with the addresses, but I don't think there's anything wrong with it.

It's not a significant amount, relatively small, but I would naturally like to withdraw it. Reading online I can see there have been issues with Bibox, but since I'm getting some sort of response from them I have to keep pursuing the issue. Perhaps they are insolvent and waiting for a bull run to be able to support withdrawals? I don't know

Anything I can do?