OnePlus India — Defective phone sent online purchase from amazon

Address:

628003

The mobile started giving trouble from the begining. I failed to return during the return period. I contacted the support. They tried for two weeks and informed me to approach service centre at chennai ( 650 km away) now the mobile lying with service centre. Amazon- the seller did not mentioned iem and sr no in the invoice. Service centre informed that warranty is not applicable since the iem and serial no not printed in the invoice. A great collaboration to avoid warranty. I regret to inform that i have not used the mobile without problem for a single day. I do not know paid service will take how many days.Now i am after amazon and one plus- great mental tension