Vehicle Not Up to Standard/ Poor Customer Service

I have purchased many Toyota vehicles all brand new over the years. At the beginning of 2022 I purchased a brand new Toyota Hilux Double Cab with all the extras fitted on at the Branch. From the 07/03/2022 I have been sending through complaints to the Branch notifying them that the vehicle has a miss and occasionally jerks especially when driving on highways and freeways. They took the vehicle in once and said the problem is sorted out. unfortunately for me the problem was never sorted as it still jerks right up until yesterday. The second issue i have is that every time it rains the left passenger door gets flooded with water. it has now become my problem to keep releasing/draining that water. I have reached a stage of total frustration as this vehicle that i purchased definitely did not meet the quality checks of Toyota. I am not impressed with the customer service that I have received from Toyota. The Toyota Hilux is also not an entry level vehicle and cost me a huge sum of money. Clearly you are only a valued customer at the time of a sale.