King Price Cannot seem to assist their clients

I have cancelled my building insurance with King Price in March 2015, of which I would of liked to cancel before, but their system was always offline. Eventually after cancelling, I received a new quote for the premiums that I have to pay. Upon the debit date for king price for April and May, they have still deducted the incorrect premium. I have liaised with the consultants, but at that stage they where offline. So I was promised a call back. When called back, I was told that the over charge will only be refunded to me in 10 days, of which I Challenged, as when my account was debited it was immediately, and I commited that over deduction to other things. I then sent client care an email(25/05/2015), of which no response(I got a read receipt back), and I sent them one today(28/05/2015), of which still no response. This is about the , I cannot even keep track, of which the \ SO CALLED"client care never responds. <br> I am paying for a service"