on mexc exchange I have already got coin I want solution for kucoin, if you know please help.
and by the way I am not here to convince to you or someone, I have issue so I want help from you experienced guys.
Posting your TXID here would help us understand better but MetaMask shouldn't even accept a TRX address as a valid one when you're using the BSC network. You would get something like this instead:

As for your problem with the support, then as I have mentioned before. You need to contact the support (or maybe ask them here as well[1]) and wait, there's no other way because you can't access your private keys with Kucoin.
[1]
https://bitcointalk.org/index.php?topic=5163269.0