Micromax X280 mobile

Just 2 day back i purchased Micromax X280 mobile but i was totally surprised due to it's poor battery back up,the company claimed a talk time of 8 hours but it actually gives a talk time of 1 hour instead of 8 hour.It's a totally waste of my money.As the company mentioned in their website that this mobile has a talk time of 8 hours but i am totally disappointed with the company that they are giving fake specification about the mobile and cheating with the customers.

i purchased the mobile a few days back. it is not even giving 30minutes battery backup. please solve the problem.