just bought a laptop it switched on now it does not
I'm trying to contact the seller
OK, good idea.
Or are you thinking that maybe the internet world would know who this seller is? We can narrow it down to 1 in about 2 billion. I'd think anyone under 16 or over 70 would not sell you a laptop, someone from the jungles of Peru or the Australian Outback would not either.
You can rule out anyone currently working on an oil rig in the Pacific. Also anyone in a coma.
Try Bill Smythe, 34 Yorksire Way, London, England.