Spice Jet Airlines — disability treatment

Address: Chennai, 636401

We (Myself and my husband - both senior citizens)
Checked in for my flight at chennai airport
Due to my limited mobility i am using a battery-operated mobility scooter.
When i checked in for our flight :
A) mobility scooter was treated as a baggage.
B) i was boarded as last passenger.
Spice jet nodal officer has turned down my representation saying that the excess baggage fee was charged in accordance with the policy and any article or baggage given for check-in during a travel will be considered in the baggage allowance. These unfriendly terms and conditions framed by spice jet airlines has caused me discomfort.
This is in violation of the draft rights of persons with disabilities bill, 2012
I am a frequent flyer member and have travelled in many airlines in india and abroad., with my mobility scooter, which is
A) transported without any additional cost
B) and priority boarding was ensured for disabled passengers.
Surprisingly these policies were not followed in spice jet.,
My concern is whether spice jet will treat the mobility scooters used by handicapped persons as baggage and charge as luggage allowance
Or it will be transported free of cost at least in the near future.
Their policy will be helpful for similar disabled passengers.