Broken Vw polo vivo

Good day

I bought a brand new polo vivo 2024 model from VW bryanston on the 8th of February no issues in the car sale guy advised we can use 93 fuel in the car don't have to use 95 and it also shows that on the petrol cap

On the 23-05-2024 The car started making a funny noise from the engine I than told my wife to call the emergency assistance to tow the car

They towed the car to vw soweto, I then went there in the morning and was advised if any damaged caused by physical damage it will result in a payment

They called me the afternoon and advised me that the spark plugs were damaged due to using 93 fuel in the car and had to pay 2.4k I than advise that the sales guy advised that I can use 93 fuel and it states that on the petrol cap

I than logged a complaint with VW SA in that time sent my wife ti vw soweto to pay for the car as we needed the car

They advise that it takes 48 hours for feedback and I was furious dropped the call in anger and frustration

A lady by the name of Karen call and asked for pictures of the petrol cap and the invoice

On the 4-06-2024 car making the same noise and was booked with VW Bryanston for assessment and I even took videos of the car engine making noise

I got call from VW bryanston advising there's nothing wrong with the car

On the previous case I was advised that they will jot refund me as the type of fuel used was bad for the car

How should i what quality of fuel does all the garages have.

The car uses 95 or 93 regardless

I would like to return this car I disgusted at the service form VW south Africa