Consumer Redressal

I booked a Go Air Ticket for 19th Nov 2020 through Make My Trip. Upon reaching the airport, I was told the flight had been rescheduled and has departed early. I had no intimation on that. So I was offered a ticket for next day ie.20th Nov 2020. I got a recorded call from the airlines the same evening stating the flight has been cancelled and to reach out the customer care for further assistance. I tried calling the customer care for more than 2 hours but the call was never answered (is never answered). Left with no option I had to book an Indigo ticket and I reached the Go Air office where I was assisted to raise a refund against my ticket. I was handed an acknowledgement and was told to expect the refund within 10 days. Now its been 15 days. I have no update on the refund for all the calls and Emails that I have made. I am very disappointed with the unprofessionalism.