Royal Enfield — unsatisfactory servicing of my thunderbird 350

I went for servicing of my bullet yesterday at bhilai (C. G)... I have issues related with oil leakage, other parts were working fine.. After servicing the problem still remains same and my problem got worst when its chain spocket starts knocking... I am pretty disappointed with servicing... Also they have earlier estimated cost of around 400 and made final bill of 1035 inr.. They take whole day for servicing and didn't resolve my problems.. Kindly process my request and provide me resolution regarding this... Waiting for your reply...
Regards
Dr rizwan khan
Mob [protected]