gave my adress to seller ( correct adress, check!) money withdrawn from account, not received by my wallet in electrum... there is no support or nothing in electrum, any suggestions?
There is nothing electrum can do about it. Here is what you should do.
1) Ask you seller to give you the transaction id. See on any blockchain explorer that indeed your seller has sent in your transaction.
2) Check if windows firewall or any other antivirus or firewall is not blocking your traffic to electrum.
3) As HCP said, see if you see the green dot at the bottom right corner of electrum.
4) Report back here and let us know what the issue was.