Unhappy Client

Good day, i bought a Datsun Go from Nissan Northcliff and after few Month it started giving me problems of Jugging and loosing power then it will just switch off, since the Car is still under Warranty every time i get stuck they will come Tow it and give me a Courtesy Car, last year on the 16th of December i got stuck at Mokopane and i was told to book a Hotel and sleep for a night as there was no Courtesy car but i will be reumbersed, i did book a Hotel and submitted all invoices for refund but till today my refund was never paid, i took three Month to get my Car back and still am getting stuck with the same problem, basically i have stuck five times with the same issue and i advised the Dealership to exchange the Car as its putting my Life in Danger and that of my Family as it just stop on the middle of the Road without a Warning, out of the Five times it got fixed once were they had to change the Gearbox but the problem is still there but they can`t fix it and they are now claiming that there is no Fault on the Car even though i have sent them Videos of the Car while stucking, as am writing this review the car is stuck and is at Nissan Clear water and i have been asked to always put Petrol so they can do further Test which i don`t understand because is still under Warranty, at first i refused to buy Petrol and they threatened me by saying they going to cancel the Rental car and i will be left without a Car, i bought Petrol and they came to say they can`t find the Fault and they suggested that i must Trade in the Car and their offer is R110000 and the Car is still owing way more than that and on top of that they don`t have anything within that price range, am now stuck with this problem please assist.