"Not able to contact hospital"

I recently had tests at Hairmyers Hospital, which I need before I could have an appointment to receive treatment. I was told after I visited that I would be added to the waiting list, and I would receive treatment in early June.

Now I’ve received a letter, but instead of a notice for treatment, I’ve received an appointment for Monklands Hospital for the same tests I’ve had before.

I’ve tried calling Hairmyers to let them know of the mistake, but I’ve not been able to get through.