Total NOOB here and desperate for help

[CherryBlossom]

On a site called Lystia I bought .20 bitcoins off of a fellow user. His deposit came in at 10:26 and my account read positive 20. Two hours later I look and the BTC's are gone. He had wonderful reviews from tons of people who have bought from him. So I don't feel like he would just target me but from what I can tell it seems the same person who put the coins in took them back out. He says he doesn't even know hot to do that. Help!!

[Quickseller]

Do you still see the transaction on the blockchain? What address did you tell him to send to?

Did you create a new wallet after he sent the funds to you?

[pooya87]

you need to provide more information if you want any help.
the bitcoin address that you received the funds in or the transaction id.

i am assuming that you are using Electrum since you posted here.
so did you download Electrum from its official website or did you download it from a fake website?
was the address created by Electrum or did you import it in?

do you have an updated antivirus / malware protection? check your computer with them.

from what I can tell it seems the same person who put the coins in took them back out. He says he doesn't even know hot to do that.

what do you mean?

did you actually receive the bitcoins in your wallet. i mean was the transaction confirmed?
or did you just see the transaction with 0 confirmation.
at the bottom left of Electrum the balance is like this:

Code:

0.0[0.2unconfirmed]

unconfirmed transactions can be double spent!