Hero Motocorp — bike handle issue

Address:

New Delhi, Delhi, 110083

Hi team,

I made service my bike, before the service my bike handle was working properly but after service my bike handle was unbalance so i came back to service centre they sd every thing is good but i was sd it is not balance they started argument with me i went to mr n k singh (Manager) he did not support us. Plz help me and take action as soon as possible. It is my first experience and my first experience is very poor.