If you sent an enormous amount, you better double-check their ToS, see if they really can't get the fund back.

Nope, cryptocurrencies do not work this way, any confirmed transaction within the blockchain won't be reversible, well it theoretically can, but in your case, there is nothing you can do.

If you think the amount is worth to getting back, as I said it first, try to examine the ToS, see whether the exchange stated any wrong payment information or statement about it. If they are able to help, sometimes there are fees required to get the funds back, and it might take a long process and I think you have to deal with KYC and that kind of stuff. Or if the exchange can't help, then there is nothing you can do but to learn it as a lesson.

so first of all u need to do is open ticket and tell everything usually token has same address this actually become comoon issue people throw token to erc20 address and customer service usually will aks you signature message kyc and etc