Flyingkiwi 73, On reading this I immediately suspected that your instructor was a certain "A" cat who used to be CFI for the Otago Aero Club, but now manages a commercial flight school, as that is exactly what he likes to do. I.E. throw the aircraft around while you cannot see a horizon until you reach your own limit of nuasea.
However I see you fly mainly Omaka and Paraparam, so unlikely to be the same one. However it is good to find your limits while training and not while on a flight test.
For the OP, if anyone is prone to airsickness during normal flying then they probably shouldn't be trying for a PPL.