I am trying to understand.
Yesterday, I exchanged bitcoin for eth through exch and sent it to my own uniswapAPP wallet.
1. You swapped BTC for ETH on eXch yesterday.
Then I exchanged eth and sent it to my own bitget exchange.
2. Then you swapped this ETH for an unknown token/coin using your Uniswap APP wallet, and sent it to Bitget.
What should I do?
How is it related to eXch?
Why are you asking the question here instead of asking those who are blocking your funds? It has nothing to do with eXch: you should contact Bitget support.
If the goal was to get USDT, you could have done it at eXch, which does not segregate funds. You chose to use a shitty exchange (Bitget); that's your problem, sort it out with them.