Please somebody help me!
People have already told you what to do.
They have sent you via the Omni chain, on top of BTC, those USDT are yours but your wallet is not designed to support them so it can't read the balance.
So what you need to do is export the private key of the address to which the funds have been sent from electrum and import it into a wallet that is compatible with Omni, either Omniwallet or Coinomi.
https://github.com/OmniLayer/omniwallet/wiki/Importing-a-Private-Key-into-Omniwallet.orgI apologize I am a newbie. Are you saying my USDT amount is in my Electrum wallet but can't show it?
How do I make it show it and transfer the USDT to a USDT wallet?
Again, Electrum will never be able to show you the USDT.
You need to follow the steps everybody keeps mentioning, import your private keys from Electrum to another wallet that supports Omni.
If Electrum does not support USDT then how could they have sent the confirmed USDT to that address and where did my USDT go?
Electrum is a wallet, it manages your addresses and nothing more, it doesn't any approve or reject transactions it's not like a bank account telling the operator that the IBAN is wrong.
You can send to that address you mentioned USDT or BCH, the transfer will still be valid as you've provided a valid address, ChangeNOW had no way of knowing what wallet you use.