No teacher for Psychology

I need urgent help guys. I'm in IBDP 1, and I don't have a psychology teacher. In the beginning, we had one and she taught us till the Cognitive level of analysis and abnormal psychology from the options. I have taken Psychology as my HL subject and now it's almost the end of the year. We had a teacher who came on weekends to teach us but now she has also left, and she told us that what we learned in Psychology from the old teacher was the old syllabus. I'm very worried guys.

Get the specification.
Get decent revision books and work over the summer.
Make a complaint to the headmaster.

Clarify with the exam board what you should have been learning.