Never ever buy a Renault!!!

So I drive a Renault Sandero 900T Expression 2017 model. The vehicle did not have any issues. I took the car for service on 25 June 2021 and was told I must fit an "Accessory Belt" which I did (paid big money for it too) . Fast forward less than 4 months later the car gives me issues until in December 2021 the car just would not start and I booked it into Renault. On 10/01/2022 I'm informed I must change the entire engine. Yes, the car that got serviced in June needs an entire engine change in January for whatever reason Renault sees fit. Now I'm without a car. How could they not pick up the issue in June & notify me then before taking my money for the service??? As for the warranty? I guess I'm just fresh outta luck.