In this case I understand that external physical damage to the charge point has been done(unknowingly) . For such cases the warranty doesnt hold good as per the terms of condition wriiten in the Bill or warranty card. In similar situation I also paid to NOKIA for rectification of IC in the charge point.
This is a external damage issue so they will definitely charge.......But they shud tell u the price before hand...I have exactly similar issue but in nokia simbian phone....I had to pay for IC in charging point..it cost around Rs 300 from Noika authorised center and Rs 125 from unauthorised center...BTW how much they charged you ?