Nokia Service Centre — not issuing bills in case of repairing

Sir i have bought a nokia mobile ( Nokia X2 IMI No [protected]) on 22 april 2011. I have a problem during charging, actually it takes about 5-6 hrs. On otherside when i charge this battery in another nokia mobile it takes 2 hrs only. I also complained in Nokia care Agra( job sheet no[protected]/110517/64) but they didnt give me satisfactory service and told that this is not a problem. for your kind information i am a pemanent user of Nokia mobile since 2002. At this time i have 5 nokia mobiles but dont have any problem regarding battery charging except this phone. So now i complain you please take it in consideration and i hope you must give me a better solution.Contact Mobile no-[protected].