Hello Simon,
My name is Alex and I am part of the Community Relations team at EconomyBookings. We are sorry to hear that you are experiencing difficulties with modifying your booking. Due to system limitations between our platform and our rental partners, we are currently unable to make direct changes to an existing reservation.
The only available solution is to cancel the current booking and place a new one. Please note that if a cancellation is made less than 48 hours before the scheduled pick-up time, the booking may become non-refundable, as outlined in our Terms and Conditions.
For further assistance, we kindly encourage you to reach out to our Customer Support Team or visit the Help Center on our website.
Kind regards,
From your team @ EconomyBookings