No reschedule or no atleast 75% refund from redBus or Kallada Travels

No reschedule or no atleast 75% refund from redBus or Kallada Travels:
Ticket no. TN6J6151311
1st time I used redBus app so I’m not sure about their tricky cheating rules.
No email working,
No boarding point phone no. Working,
On kallada travels’s ticket sent.
Also customer care no. On redBus not working
redBus app is entirely built to cheat middle class people
I booked return ticket Rs.1500 on Wednesday for kallada travels from Trivandrum on redBus app on monday but unfortunately I happen to stay for 1more day and so I requested on Wednesday morning for reschedule to next day on Thursday Evening.
I requested redBus app it showed ticked can’t be cancelled or rescheduled should be done before 24hrs.
I contacted kallada travels there I received answer : “since I booked via redBus ticket can’t be rescheduled or cancelled, if you booked via kallada Travels website there is a chance” also he gave me main office phone no. When I called main office there is no response.
How come they can’t refund or rescheduled That huge amount of Rs.1542
How these people cheat common people
I request don’t use redBus app or kallada travels