20 000 km magnite with ceased engine and no support from Nissan

I am in desperate need for help for my sister. she bought a brand new Nissan magnite and the engine ceased after 20 000km She is not getting any assistance from the relevant nissan branch. my heart breaks for her... this is the first new vehicle she could afford... unfortunately she couldn't afford anything better but she was ecstatic about the purchase after many years of struggling heavy financially. Nissan is adding new struggles to her life. you won't even give her a replacement vehicle. she just forked out 2500 to hire a vehicle which takes food of their table and leaves her in financial distress. i will do anything to help my sister even if i have to destroy Nissan can someone please take responsibility for your useless vehicles and give my sister what she deserves. Which is probably a new useless magnite. she doesn't deserve to be left with a defect which will leave her around every corner....man up Nissan, give her a new vehicle or her money back!!! you are ruining her life!!!!! you should be ashamed