Complaint Review: GEICO

I am writing in regards to Geico and their intrusive and controlling way they handle their business practices. 

I added my daughter to my insurance policy via internet. She dicided to buy a new car and move to Fl. at which time, I called Geico to remove her from my policy, late May, 2016.  They said they couldn't remove her until they knew her new insurance company, which I did not know.  She is 21.  They insisted to the point of harassment, so I said I would like to cancel the whole policy.  I had an electronic paymet taken out on 5/26, and wanted to cancel due to unsatisfactory tactics on their part.  He said I would have to report my new insurance company or sign a release of services.  I signed nothing at the conception of this account, it was via internet, so was the addition of my daughter. 

This went back and forth for several days, I obtained another Insurance provider, and discontinued payment.  They continured emailing bills, payment schedules.  I called.  They had received my new information however, they wanted my daughter's new insurance company's information.  I explained, she is 21, in the state of Florida, and I can't make her or her new Ins. provider send you the inforation, when it is not their jurisdiction. 

I just received a pink Cancellation notice with a demand of $703.43, with a balance of $1,683.43, which is twice as high as before, and I did not agree to this, and I cancelled them, and retained another on June 24th.  I owed them nothing!

I am prepared to go to any lengths to hold these people accountable.  They have stocked me, harassed me, and now are trying to ruin my Ins. record by issuing a Cancellation Notice for non payment?