Hero Electric — Taking money for free service

Address:

Bihar, chapra

I have a hero electric flash .I have 3yrs warranty on my scooter.but recently my motor has some issue.when I went to service point, service manager took two thousand for exchange motor .they were talking badly.they also threatened me.they do not provide me job sheet.they were provided me hand written cash memo.their behavior was very rude.please help me .as soon as possible.