Can you check a third-party block explorer such as
https://blockchair.com that can confirm you send the funds to the right adress? (This is step one?)
If not; there's your problem.
You most likely either
1. downloaded a fake Electrum version (malicious), or
2. got a popup to download a fake electrum version (this was an exploit in older versions of electrum. Tell us: did you download a "new" version of electrum through a popup in Electrum?)
(You can check if your version of Electrum is legitimate by verifying the .exe /setup signature which can be found on the site.)
3.otherwise got infected by something (clipboard hijacker which replaced your adress for example.)
If any of the above happend, your money is most likely gone.
Otherwise:
If the money's there, and the transaction is confirmed; the ball is in the park of the recipient.
It could be that they are scamming you;
or if they're a company; they might have problems with their service infrastructure, or the script you're using (Native segwit) to send the transaction, without more information, this could be a plethora of things.