Accidental transfer from AVAX (C Chain) to Binance BEP20 (BSC) address

I have made a stupid mistake in transferring from Metamask (Avalanche network) to my Binance platform BEP20 (BSC) address back in March.

I have contacted Binance for a few times but they claimed they can’t retrieve it (which they initially said they can do so).

Anyone have similar experience? It seems that I need to wait for Binance to support C Chain deposit before my AVAX can appear again…