Motorola / Z6 Premium — Poor customer service during guarantee period

Hi,
I had purchased Motorola Z6 Premium cell phone on November 9th, 2007 from Sangeetha, Ace, Bharath Mall, 3rd floor, Opp KSRTC, Bejai, Mangalore-575004
with the set number [protected] & bill number SI/MNG/5302.
Since then I am facing so many complaints like the Memory card getting corrupted ( 3 times since the time of purchase), the ‘Navigation key’ & the ‘center key’ getting worn out. To my shock, yesterday, the ‘Push bar’ also got worn out. The battery gets discharged too soon (within 15 hrs) even if I don’t make any calls.
It has just been 7 months from the time of purchase & I have the guarantee for 1 year during which I have a free servicing from the local service center of Motorola.

I had complained to the Motorola Service Center (UCOM Technology Pvt. Ltd) in Mangalore many times & with a lot of delay they replaced the panel with an old one, but it was of no use. They had also replaced the 1GB memory card with another one which they had, but that too got corrupted once.
I had bought the cell liking its features & the due to the good reputation of Motorola Company. But all my belief is shattered after I have been using this cell. The servicing is not at all good & they don’t even respond properly to the consumers. If this is the way the consumers are treated even when there is guarantee period, then what will be the state after the guarantee period is expired? This has really created a mental trauma to me, always going to the service center & getting a negative reply.