Coldplay Ahmedabad accommodation for 24th Night

We luckily got 4 tickets of Coldplay and booked everything instantly. But today our Hotel told they can’t proceed with our booking.We are not able to find any place that are available . Hostel that charges 800 rs for a night for a single person is charging 8500 per night. If anybody have an idea about accommodation then let me know or else we are planning on getting a sleeping bag and sleep at airport itself attend concert and get out of Ahmedabad to other place. This is my first time coming to Gujarat 🥹.