a person is using a set of numbers with a circle and a lot be drawn through the circle to get into my phone and do things via telephone call text messages how can I stop this and protect myself large amounts of data are being used

As far as I have intelled the curser is binary and goes touch ten is in you tube and other apps there telecommunications given it direction on what to do with a single phone call or text messages please reply seen why my own eyes with a phone no sims card not even turned on made a phone call to it it rang and he spoke to me he narsecisist and claims to have mental problems but he's perfectly fine. What to do?