Peninsular Honda — amaze car service

My amaze car, kl.19 d 8820, was given to peninsular honda service centre, kazhakuttom, thiruvananthapuram, for car wash only but they take additional works with out my permission and billed an amount of rs.2005/- i informed that i cannot pay the whole amount, i pay only the car wash charge only but they do not take any action for my complaint. So please take needful necessary action.