Spice Jet Airlines — delay and discomfort to senior passengers

We booked spicejet to travel from ccu to ixm via maa on 02 august 2019.
Spicejet emailed me on 19 july 2019 to inform that our "flight sg 277 dated 02-aug-2019 from kolkata has been rescheduled due to runway maintenance at pune and will now depart at 04:05 pm." i called up spicejet customer service on the same day to acquaint them that this would not allow us to board the second flight sg 103 from maa scheduled at 18:40. They then offered me the option to fly via mumbai on the same day by flights sg 488 from ccu to bom and sg 6378 from bom-ixm which i agreed. However, after arriving at mumbai airport, we were asked to travel to international airport for which we had to take a taxi paying inr 250. It was raining heavily at mumbai and there were 2 senior citizens in our group. The next flight departed from bom over an hour later than scheduled time during which we were seated inside the flight without any announcement. After nearly an hour of waiting, the pilot announced the reason for the delay.