Redbus — refund

I have booked ticket from mumbai to mehkar at 11:50 am on 23/8/2019 and want to reschedule my journey on same date but they dont allow me to do so and said that rescheduling and cancellation is only allowed till 7 :00 am on date of journey so kindly inform if i have booked my ticket at 11:50 am then
How can i reschedule or cancel my ticket at 7:00 am however they said we mentioned our policy on booked e-ticket (Mail) so my question is we getting the mail after confirmation of ticket booking so what we can do after booking??