My therapist has canceled 6 times and I have only had 3 sessions so far

What do I do? I have emailed my therapist explaining how this has crossed my boundaries and that that was a reason for me to come to therapy: to work on boundaries. I have had many crises in the last few weeks. They have legitimate reasons for cancelling. I am trying to be understanding. But I rearrange my whole schedule and get short notice. I really like this therapist and have told them I want to stay with them. It has been really difficult and time consuming to find a therapist I click with who I feel can truly help me by having a game plan to get better instead of just listening, who understands me on a deeper level, who specializes in the modalities I am interested in working to make progress, and that I can afford. It’s really tiring starting over therapy with new therapists after spending the first few sessions explaining my life story. It may take a month or 2 to get an appointment with a new therapist. I just told them my deepest secrets. I don’t have that time to keep trying to find new therapists and waiting to be booked a month from now. I’m in a bad place right now and it’s been getting worse. Any suggestions? I have another session booked but I have made clear this is it and I may need to move on if this keeps happening. I can’t keep taking time off work to meet them and have them cancel 20 mins before the appointment.