somebody , please help me......

i try to update the firmware on my n79 phone by following instructions on nokia website, but everytime also i wouldn't be able to complete the update because my internet connection is unstable..... now my phone became very slow n i can't play some of the songs in my phone.... where can i bring my phone for repair and also update of software? i dun wanna bring it back to the shop where i bought it because it's very far from my house.

my phone is an ori set by avaxx. will there be any charges for it?

thanx a lot.... but where can i find nokia authorised center in kl?