Struggling to cancel contract - no response

I have phone the call-center 3 times, and written 4 mails over the last 5 days to get my contract cancelled - with absolutely zero response. Can somebody please contact me so that I can cancel my contract. If it takes 5 days to respond to a simple cancellation request - you are not the security company for me. It will then probably also take forever to arrive at my house in an emergency.