Church double booked!!

I knew the wedding planning was going too smoothly! We get married in 8 months time and booked our reception venue around the date of the church we wanted. This was booked months ago. Today we have been informed that there was a mix up and they have double booked! A couple booked the church a month before us. We have booked vendors, honeymoon for the day after, our reception venue, have wedding invites etc. Guess nobody here can help but just needed to vent!! We were due to get married at 2. Even if it’s bought earlier, we are somehow going to have to get another meal in the day as we can’t expect people to wait until 4/5 to get fed. If it’s later, then people won’t finish their dinner until 9pm and we will lose light after the ceremony for the pictures. Nightmare!