Terrible experience

I received a terrible after service sale from a Hyundai dealer in Bellville Cape Town After buying and collecting the car on the 19th of August 2026 ten days later after putting in full tank petrol on the car the fuel gauge only went up until the middle showing only 228Km after putting in 43Litres, I then contacted the dealer on the 1st of September and I was advised to bring the car in for them to check which I did, then they said the car needed a new fuel sump to be installed and that would take 3 days they will order from Joburg and 3days days became 2 weeks with back and fourth while I continued to drive an unsafe car since I dont have a choice, I decided to take the car back to the dealer on the 16th September and asked them to cancel the purchase of the car they have been ingnoring my emails since today, the only response last week from the manager was that he will speak to his regional manager not response yet, this is my worst experience with the Hyundai brand.