Go to history tab.
You are seeing the transaction as a list.
Right click on the transaction, you will see some options and one of it is, Cancel transaction or just cancel or may be it is saying double spend. Whatever it says, it's the options you pick.
Click on it and follow instructions.

P.S: It's hard to give very specific direction if the window is not open to your end. Right now I have no facility to open an Electrum and give you specific direction other than what I provided already.

I see the list of transaction history I right click all it says details copy edit do you unblock explore I’ve tried everything that says nothing about cancelling it but thank you for your help. I’ll just wait it out.

Considering it's bitcoin and you have the private key. In that case, you can cancel the transaction. I did it using Electrum. Download the desktop version. Restore the wallet with the private key. Mouse hover and right click on the mouse. You should be able to see an option that will say Cancel/Cancel transaction kind similar thing. Click there and it will show you what to do.

I did it long ago, and if I remember correctly then it worked too. Try it.

[edit]
Fee per vbyte 84satoshi spent on the tx and it's unconfirmed from the last 7 hours! Mempool is making history LOL

I hadn't thought of that. Thanks.



You cannot cancel it. If the fee is too low, it will eventually be cancelled by the miners and returned to the original address.


Do you have no more funds in the wallet you sent from?
When I select pay and hit sweep which clears out any remaining coins it says send 0.0000001BTC VLUE 0.4 but when I go to my wallet it shows public key and the prv key below the my bitcoin address it says 0.050 recieved?

Do you mind sharing the tx id?

You can use RBF to replace the original transaction with a new one that has a higher fee. To do this --you need to create a new transaction with the same inputs as the original transaction but with a higher fee or if you need to cancel it just place the higher fee but a lower amount of bitcoin. The new transaction must also have a higher sequence number than the original transaction. Because when the new transaction is broadcasted to the network, it will replace the original transaction, effectively canceling it in short.

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Before making any transaction and to avoid hurrying, always refer to this site ^{[ https://mempool.space ]} to see the status of the network, when congested, set into a higher fee.

If you sent the coin from and exchange then there should be a button or link to cancel it but if it's already sent to the blockchain then I do not think you will be able to reverse it since you do not have the private key of the wallet.

You need to wait until the mempool picks up all it's transactions. It will take a while depending on the fees that was set.