Can I sue a local driving school?

Judge, I want to sue a local driving school for incomplete lessons. I originally signed on for the school's 10 hour package which cost $400. This package included free pick up and drop off as well as private instruction. The driver was late for our first lesson. He apologized and told me we would make for it later. The next day he was 45 minutes late. I asked him were we going make up for the loss time. He told me that he would add it on to the following lessons because he had another student to pickup. I agreed. We had one remaining lesson left on Saturday, but he had to reschedule due to an emergency. No one contacted me. I had to email them on Monday and remind them about the canceled lesson as well as the 45 minutes. They gave me some new assigned times. When he came to make up for the canceled lesson he was eighteen minutes late. I had a conversation with him and let him know I wanted my money back for the canceled lessons and the loss time. They only agreed to refund $75. They charged me a late cancellation fee for $35 because I told him I didn't want continue once he arrived. I feel I am entitled to at least $120 for the lesson he canceled late and the other loss time. How strong is my case?