Nokia N73
Phone start up problem

Hello sir/madam

i own a mpbile called Nokia with model no. N73 . i got the problem called "phone start-up problem. pls contact retailer".

i gave it to the nokia care for service (authorised service dealer).

they kept it for one week.

after one week they are saying we cant do it.

i bought the moble last year in Dubai.

now im in india.

what can i do now.

pls give me a solution for my mobile.