EaseMyTrip.com — Rescheduling request unaddressed

I booked a flight ticket from easemytrip.com on 6th June for Nagpur to Mumbai 15th June 2020 . I asked ease my trip to reschedule it on 10th June 5 days prior to journey date to 6th July an executive confirmed me that I had place request on my behalf. I got mail of confirmation also that Reschedule request confirmation. After that they said me our team will contact you within 24hr so I waited for there revert but no one has contacted me on that then I contacted them still no respond from them. On 15th(on date of journey) I got mail and sms with rescheduling link at 9.56AM which of not working. and then I contacted them and was on call for 2 hrs after that they said ma'am you have to pay 3100 rs as your flight has departed. I send them mails even to CEO also but no one was ready to respond the problem with there system and i have to bear a cost.
This mail I send them and they and not ready to respond me on anything
''Dear Team,

I am Akruti Gupta. I booked a flight on 6th June from your portal for 15th June, I tried to reschedule my booking on 10th june for 6th July but on the payment page some error has come and then when I tried again the page was saying link is expired( Attached file for reference) and after that I contacted your whatsapp communication and there was some Mehboob named executive who helped me in raising request for rescheduling on my behalf, after that i received a mail communication stating that Reschedule request confirmation ( Attached file for reference ) and on 13th when I called your customer care no and some executive has said our team will contact you by EOD then no one has contacted me. On today morning when I contacted your customer care number executive had told you have to pay 3100rs for rescheduling because its within 4hrs of departure but I’m contacting your customer support since from last 5days and have got revert today in the morning at 9.56AM and 10.30AM. In all the above scenario no one has contacted me stating that there sis some issue we can processed your request

I attached whatsapp communication, screenshot of error and reschedele request pdf."