Nissan is the worst..

This is the worst place to purchase a vehicle.. We bought a Nissan magnite in 2021 brand new after 20 000km service the trouble starts.. In January 2023 the car broke down and needed a new engine we waited over a month for the car to be fixed.. When i went to collect the vechile with new enige, with scars and all messy I was driving 30km and the car with its new enige broke again. We already sold the car because of bad service.. They told us the car will be fine today but its broken again... And now.? What now? ENGIN is broken with 50km on. If this is not sorted out very quick.. I will take further steps...!!