$4.20 was 'best price' [TAB's], not [necessarily] Bookie's Top Fluc.

$3.60 was NSW SP price.

If you have taken Top Fluc. price and you dispute the price, contact the bookie's Australian Pricing Network [APN]. You will have to ring them I think if you have a dispute over a price. APN:http://www.raceday.biz/

I very much doubt a Bookie would give you a false TF price. It wouldn't be worth their while.