Lenovo — Laptop isn't charging

I recently bought one legion laptop 2 months ago and it's now not charging. I have complained about this and it's been 2 weeks. They are showing very irresponsible behaviour, and I have called multiple times. I was supposed to give my exam on June 15th for my online test and had all my submition files in laptop and I wasn't able to access it. You call it premium care, but doesn't do anything which shows premium. It's more than 2 weeks now and I still don't know that when will I get my parts and laptop will start working.