Nokia N72
Hanging Problem in a piece bought 3 days back

I bought Nokia N72 (Gold coolur) (Model No.356966017014368) on 8th January from 'Top 10' in Andheri East.

Soon after buying i realise that there is a hanging problem in a product. So next day i got it replaced from the same dealer having model no. (Model No.359570011224663). But in that piece too ther is a hanfging problem.

So again i got it replaced from the same dealet having model no.(Model No.359570013227136). But in that piece too there is a hanging problem.

Now i used 3 pieces in 3 days, all having hanging problem.

Now i am thinking to buy some other phone. But what about the trouble i caused. Can i complain Nokia directly about this. Please help..