"Booked in for surgery in error"

I'm awaiting surgery with ENT.  Had a call from Stobhill to book me in for surgery.  They stated a surname that was not mine, but first name was the same as mine in the voicemail they left to call them back.

I called back and they told me I must have made an error.  They checked my name and DoB, then confirmed it was definitely me and that my surgery was now booked for the following week, with a pre-assessment and an initial phone consultation.

I was delighted, as I continue to be in pain and have been on the waiting list for many months. I informed my work, and my husband booked time off to take me to hospital, as we only had just over a week's notice. 

The following day, I received a call from the ENT department, to inform me that they appear to have mixed up my name with someone else's.  The surgery was in fact for someone else. I was told I would go back on the waiting list. 

I am incredibly disappointed to say the least, and this has caused me unnecessary stress.  

It sounded like the person on the initial call was incredibly stressed out, and overworked.  

Sending this in story in in the hope it supports some sort of improvement in the process for short notice appointment bookings. Doing it verbally by phone call isn't ideal.