VERY VERY BAD EXPERIENCE WITH ZEN MOBILE,

I bought a Zen CG555 Mobile as on dated 01-07-2010 from LUCKY MOBILE STORE Ballabgarh Faridabad (Haryana)
wide bill no-2733.
# After one month the above M.Phone got mike problem.
#Again On dated 08-10-10 Ringer and Battery problem started.

Every time I have been told that these problems are comming in normal conditions. There is no physical damage found by the Service center.

Still the mobile phone have the battery problem. I contacted so many times to service center named THE MOBILE PLAZA in faridabad but every time they are lingering on the above.
Please reply me.