No feedback on canceling building insurance

On 30 Sept and 4 Oct I have send emails to cancel my 2 building insurance policies. Received a generic automated response and read receipt. Up to date still no feedback or real answers to cancel. Hellooooo, anyone home?? After 20 years with Standard bank insurance receiving this kind of non existing service is pathetic. PLEASE CONTACT ME- I GAVE 30 DAYS NOTICE TO CANCEL!