I use monero online wallets. Any help would be very helpful.
Im willing to pay a fee to anyone who can sort this issue and a few other crypto issues like this asap.
What monero online wallet you've been using? If this is something a non-custodial one or totally decentralized then the receiving point (exchange) does have that problem.
If the transaction shown that it had been transferred on the correct address on where that exchange gives then it should really be there as long it is confirmed
and since you could track and see it fully then there's no doubt that exchange you are dealing with is something shady.
You should at least do make out some mention on what wallet you've been using and what exchange you are talking into.