Renault Poor service

Good Day

I would like to complain about poor performance from Renault, i bought my Renault triber expression new in April 2021 and after a month i stated hearing bad noises coming from the gearbox, i did take my car in to find out what was going on with no results after a month or two it started getting worse i then took it back again only to find out that it was a characteristic of a Renault Triber and Kwid i then asked for a letter stating that there is nothing wrong with the car so if something should happen that i have proof of that, that took 4 months to get that letter after contacting Renault SA them selves. then during last year my reverse sensors started acting up, i can put the car in reverse and stand still with nothing behind me turn the steering and it goes of also in the rain it goes of permanently, it was taken to witbank renault for testing 4 times which if they read it into their system will show that i brought it in for that, i have just over 15 000km on the car, i took the car in for the first service also reverse sensors again. the feedback i got is that they have done the tests on it and can not find any problems as they said all the previous times. then i was informed that they will submit a "ICR" not sure if that is correct and will give me feedback it has been going to 3 weeks now and still no feedback if i do not phone them or go there i do not get any feed back at all and that has been from the start only time i get a call is to say that i can collect the car i once got feed back to say i must bring my car in for 2 days so they could to the test which they have done in less than 3 hours on the day on the service.

my warranty is a 2 year warranty and I am getting tired of getting no results concerning this, i did ask them why done they take out the whole reverse sensor system and replace it so that it can be sorted the reply i got on that is that "who is going to pay for that"

i was also informed that they going to replace only one part and if the problem continues they are going to replace another until the problem is resolved, i do not thing that is fair as that is my only car and i cant take time of every time for them to change here and there every other day as they want, they also do not have courtesy cars for the clients so i am then sitting without transport.

this is getting frustrating and I am tired of getting new excuses every time i go there or phone, most of the time blaming Renault SA for delays.

is there any advise of anything i can do so that this problem can get resolved?