Hero Electric — Electric Scooter/ Warranty related issue

Dear sir/Madam
i have 7 electric soocter of hero i want to know that what things is under warrnty of my soocter and how much warrnty in detail...
i write 2-3 mails but you did not reply of any one mail.
plz reply me
Your customer support is saying 5 product (motor, charger, controller, battery, conveter) is in warrenty.

but your serivce center is saying only 3 product is under warrnty (motor, charger, battry) of 3 years.

they charge me for controller/conveter...
Plz reply me at your toll free number of complaints did not pick call i call may be 10-15 times
is it your service... this is not fair sir/madam