I sent the gift still waiting for "Recieved" for 2 days, So what ?

Contact support after 7 days and provide proof that you've sent him the gift, they'll set it to received for you.

The winner has 7 days to activate the game and mark it as received.

if you searched the forum you would have found a lot of threads about this.

You should have added the winner personally on Steam.

Did you checked if he has it in his steam library? or if he has made a giveaway with it?

this is why i contact the winner first b4 i send them the gift, maybe add him on steam and msg him