Continually being hacked. by someone that knows me im afraid. Anyway of catching them?

I have a mobile iphone 6 and a mac. this person made themselves administrator of my computer and deleted everything. Now i am being hacked and watched, i know because i know because i know my stuff , everyone else thinks im crazy! is there anyway to catch. We are on the same network but i dont use the home inuae the cellular. injust bought Norton but he has it too! please help