Open Question: Geico added a person to my account without my permission.?

I asked for an insurance QUOTE to add my nephew who might be moving here. So when I completed the QUOTE I said he lived here because IF he moves here he might live here. I just wanted to know what it was going to cost me to insure him if he in fact did reside here. Because I answered that he lived here they automatically added him to my account and it went up 200+ dollars a month. Now they