Spice Jet Airlines — Airport staff

Dear sir,
We were a group of 7 travelling from Dehradun to Kolkata on the 13th of October 2016 at 5.15 pm.
At the check in counter your staff Disha and Mohit were really rude and Uncooperative.
My mother is paralysed and cannot stand or walk without support. They refused to give me a front row seat and said only last row seat is available for her.When I told them she can't walk at all and it will be difficult to transfer her to the seat they said it's my problem not theirs. So I told them I will request the first row passenger to shift, your staff Mohit says he will come and see how I manage that and will come till the flight to see what I do. Is this the the training you give your staff? Instead of helping passengers they threaten and smirk at you.
Moreover we were 7kgs over weight they refused to waiver off 1 kg per person and made us take out 1 kg from each of the checked in baggages.
I understand that SpiceJet has their policies and they cannot go against it but this is not the way to behave with your passengers.
I will never travel in this airline again and will tell my family and friends to do the same.
We are paying for the tickets and not travelling for free. The least you can do is help a person instead of smirking and being rude.
I really want to know the reason behind their behaviour if no action is taken I will write about this on social media and also send this to the people who are at an higher authority.
You have no right to trouble a wheelchair passenger or any passenger as a matter of fact and unnecessarily be rude. The staff that you hire are inhuman and have no courtesy.
SpiceJet really needs to improve their training and teach their staff to help the passengers instead of troubling us and making it difficult for us to chose this airline in the future.
Awaiting a response as soon as possible.

Regards
AVNI JALAN
Jalan.[protected]@gmail.com