i went down today thinking i was going to be doing stalls only to find out i'd be going over climbing and descending again which didn't go well the first time.
Why did you think you were going to do stalling? What was said at the post flight debrief by your instructor, assuming you had a debrief? Did he say that the lesson had been satisfactory and tell you that the next lesson would be stalling or did you assume it?
Even with a change of instructor your record would have said where you were and what should be next. So where has the confusion about the lesson content come from?