Samsung E 250 — Voice not clear during outgoing/incoming

Hello,

I went to one of the service center in Pahar ganj regarding my samsung E 250 which is still under waranty on 14/05/09 at 3:50pm. It was told to me that my phone will get back to me in one week, even i recived calls from custumar care IS MY PHONE IS WORKING FINE however phone still in the service center.Its really height of limit now.they dont behave normally now.
Please help me on this, Its really paining workout without a phone.

Thamks & Regards

Afsan Anjum
Copmlant No. WA[protected]
Address:- House No 2307, street mir
mir madari farash khana delhi 06
Contact # [protected]