Sometimes, even the TX has already been broadcast on the chain you still has some problem "Error! Sorry we are unable to locate this Tnxhash" there has some several reason for this issue. And sometimes you just need to wait until the block got minted on the node, but in several conditions, you still don't find any of your transaction you can check on google for this type of issue.

Is kinda hard to find the issue, for @OP did you don't want to try buying directly to exchange rather than swap on Trust Wallet? maybe buying from exchange and send the ETH into exchange can save your time without figured it out whats the problem.