Indigo Airlines — Harassment during check in at airport

Address:	Mumbai City, Maharashtra, 400610
Website:	www.indigoairlines.com

While traveling from jammu to mumbai on 7th november by indigo airline, i would like to put on record unethical episode of the staff at airport.
1. is it documented anywhere that handbaggages are not allowed from jammu airport? if no, i was not allowed a simple hand baggage and was forced to put in checkin and asked to pay. hand bag had my medicines and gold items that i never wanted to put in checkin luggage. also it just a shoulder bag not that it was big??
2. just because my hand baggage increased checkin luggage allowance by 7 kgs i was forced to pay extra (rs 1100.00)?
3. after paying extra money the same staff allowed me take hand bag in flight. if it was not allowed as per rules why was i allowed to carry it??
4. another passenger was ready to pool in my luggage (who happened to meet me at airport while i was struggling at checkin counter), indigo staff didnt allow and reasoning given to me was that because of commercial reasons they wont allow.

My grievance is two fold: why was i not allowed hand bag and later after payment i was allowed the same bag to be carried!!!
2. is this excess baggage a money making revenue stream for airline when my family friend was ready to pool my luggage