[Resolved]  Nokia — tampering with the ic by service engineer and damaging the same

i had purchased a mobile nokia n72 from delhi shakarpur 1 moth back.
my brother was using it
the mobile got a snag a few days ago . we submitted the same in the nokia care center preetvihar for repair. They initially said that the mobile had some water damage. but when we showed the same problem with the other nokia care center at lajpatnagar delhi
it told that the mobile's Ic has been tampered. now its quite clear that the mobile IC can be tampered only by a service engineer. but the nokia care center preet vihar is not accepting its fault and saying that the mobile may not work.
So we feel that this is the mistake of the service engineer at nokia care who did this mistake. but the center guys are not accepting their mistake and saying that they cant do anything
kindly help us in this regard and guide us what to do.
details:
mobile : nokia N72
name of owner :mithilesh kumar singh
user name: sudip kumar
address: 1028/3, vasundhara, ghaziabad, u.p
contact[protected]