Sony Ericsson Ck15i — Faulty set

Address:

Agra, Uttar Pradesh

Sir,
I had purchased above set thru your local dealer on 14-04-12 , but i sincerely regret to inform that it is the worst phone i had ever used.
Firstly the inbuilt phone lock is purely useless as it unlocks by itself with a slight movement of slider causing false calls, messages etc...
secondly audio speakers are of very inferior quality,key boards are not visible,recently its mother board got corrupted which was later on replaced by your service center.
Kindly suggest us the best solution for all this as i m no longer willing to use this set any more!!
Waiting for your response
SHASHANK
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