"Poor communication, uncontactable "

I have been booked in for the wrong consultant or wrong treatment by the hospital twice, and could only find out after 1 or 2 hour waits in waiting room, taking a day off work and having to be driven there, to be told they need to rebook. Terrible communication skills, even after asking for more information I have been left feeling unhelped and unanswered, at one point the consultant was 40 minutes late arriving to the hospital and then had another patient in the room whilst speaking to me. Now I can’t get through on the phones to try and book the appointment, have left several messages with no contact back and the mainline for the hospital just transfer me to the line that doesn’t accept my call. Absolutely awful experience and no idea how to resolve.