Nokia India — change nokia x2 mobile

i have purchased nokia x2 mobile on[protected] from unique sales corporation sirsa haryana having contt. no. [protected]/[protected].but its ringer is not worked properly i.e sound was not clear. sales man gave me set in open condition .i took it on nokia care .he said ringer of x2 is not available .today after 40 days i have not use x2 mobile .so please change my nokia x2 mobile because i have expended 8600/- rupees .i hope u will understand my problem and change x2 mobile to continue my desires on nokia brand thanking u.