There's no such DEX in altcoins, this one is the example where any non custodial exchange is using a centralized smart contract where they control over it. A non custodial exchange has an instant exchange since you're paying higher than the normal, you wouldn't need to wait so long.
Anyway there's no way to recover it, before with people who offer service to recover your coins because it's scam.
This is what im trying to say because if we do talk decentralized exchange platforms on which this would really be in between users kind of trade where if you do buy or sell orders then cant be sure if those would be automatically be closed up position when a DEX closes or shut down or would really be hanging out on limbo? How you would be able to say on such condition or situation because
we know that once you do put up a certain order then it suddenly closes or shut down then i dont know on what do actually happen.
@OP, Just on what most people been saying on here that consider those coins to be lost forever, there's no way on retrieving them unless if you do able to contact them
via other contact mediums which it would really be depending whether they would be giving out some response or totally ran away on whatever they had
been able to snipped into.