New fazer selector issues

[Neo]

Might be worth trying to select the gears by hand with the bike on the centre stand and turning the back wheel by hand, with the engine stopped of course.
When I say turning the back wheel I only mean rocking it backward and forward to move the gears so they can engage when you get full pedal movement, not trying to turn the engine.
If third engages engages every time that way then you might need to adjust the gear lever position to suit your own foot position. It's a long shot but if the seller is telling the truth it might sort it for you.
I have found just wearing some different boots can affect how the gear change feels.
Worth a try and if it still fails to engage gear you can demonstrate it to the seller.

agreed I tried this yesterday and it goes in absolutely fine will try today with flip flops briefly so I get full feel I really think the seller is genuine hence the doubt in myself I hope it's me as I  LOVE the bike