Have you checked on a block explorer to see if the funds went in that address or not? The OP is quite vague. There's a chance you had malware before/downloaded a fake wallet which gained control of your keys or changed the address you input on the other wallet.
Additionally, what wallet did you use? Are you sure the withdraw was processed/actually sent and confirmed.
You could also search the final address funds were sent to on a block explorer to see if anything significant comes up (like if it has deposits from other people).
Are you sure your restored the right seed and has the rest of your history for that wallet fully loaded and looking correct?
I used the service Safello to send the bitcoins to my Electrum wallet. When i have reinstalled the Electrum wallet,the bitcoin address that i have had before was gone.
There are a couple of things that could have happened to cause your issue, but don't give up just yet. Please answer the questions below and we may be able to help you.
1. Are the coins that you sent still in the the address where you sent them, or have they moved? When looking at the blockchain the coins moved to another wallet.
2. Does the address you sent the bitcoins to start with a 1, 3, or bc1?
2. Does the restored wallet have addresses that start with a 1, 3, or bc1?
3. Was the 12-word seed phrase created with Electrum or some other method?
1.No,the coins went first to the address that i wanted,but then they moved.
2. It starts with a bc1.
3.The restored wallet starts with bc1.
4. The 12-word seed phrase was created from Electrum when i first started the wallet,and it is the same. When i tried to restore the wallet with the 12-word seed phrase,there was no coins there.
I find it hard to belive that there should be clipboard malware involved,since i have a reinstalled PC,and the Antivirus and Malwarebytes detects nothing such.