I totally understand you. When I was 16 years old, my parents installed a mspy.
co.uk/text-message-spy.html on my phone. At first it was hard, because I felt that they did not trust me. But when I myself had a daughter, I understood why they did this. From my own experience I can advise you to seriously talk to them again. And if this does not help, then maybe you have the opportunity to go to college and live separately from your parents?