Sold Defective "Brand New" Motorbike

No feedback received on my complaint. Purchased a brand new motorbike on 26/11/2020 from Indian Motorcycles (now owned by Yamaha - hence all liability seems to have passed on to them according to Bryan Berger MD of Cardinals who owned Indian Motorcycles). The bike has broken down more than once, and currently has been sitting at World of Yamaha since November 2021! Seven months! No feedback from anyone! When I phone, Elmarie says she will get her manager to contact me, and noone phones. I've registered a complaint with the Motor Industry Ombudsman - and no feedback received. How are companies allowed to sell customers defective products, and what does one have to do to get resolution on a matter.