Bad service from Renault

We purchased our 2015 Renault Sandero Stepway in 2016 from Renault Brackenfell. We were the second owners of the vehicle and purchased an extended 45 000 km maintenance plan that covers certain items for wear & tear and its service intervals priced at R 12 359.52 . From the start we had endless problems, from the airconditioning not working, service centre knocking the back door before we took ownership. Waiting for more than an hour for your vehicle when they informed you that the vehicle is ready for collection for its yearly service. We requested that they check the clutch as there was issues when driving on the hill and first person saying there was problem and then another check for second person saying that the clutch is in good working order. Only if were stuck somewhere with the vehicle they could assist. Taking the vehicle in when it did not start and having the battery checked twice to see if it was faulty, my husband had to physically see them do the check and the battery was faulty it was replaced. We informed the service centre that the hooter is faulty and the admin ladies could all confirm the error as the hooter is situated on the indicator switch and its a manufacturer fault on the vehicle, we were informed more than a week later the 14 August 2019 that Renault SA will only cover 75% and we had to pay the 25% of about R550 for a manufacturer fault. I queried on my cellphone for more than an hour to find answers speaking to more than 10 people, they found a loop whole because we brought the vehicle in for it second service 4 months late hence their stance on the matter & note we didnt even get a service book with the vehicle from the previous owner. I found this to be absolutely ridiculous as the brakes was recently replaced on our last service in June 2019 and all our services was covered. We just had enough of Renault, we love our vehicle but to feel unsafe in your vehicle and we have a 5 year and 1 year driving with me daily. We decided that we just going to cut our losses sell the vehicle and purchase another vehicle through a reputable dealer even if cost us more.