Welcome to the bb forum.
From my experience, you can definitely see any psychologist of your choosing.
Many people change treating practitioners for a wide variety of reasons-cost, distance, available appointment times, etc. However, it’s really important to change if it’s not the right person and/or the right treatment for you.
I could be wrong but you should be able to see any GP to help you sort it out.
The administrative side of mental health care plans is a bit tiresome but I’m sure you’ll get there. Good luck!
Kind thoughts to you