6 attempts and no response to multiple emails addr

I have been trying to cancel my homeowner insurance done through Standard Bank since the 13 of April because I have taken out a new policy. The first e-mail sent on 13 April got a favourable response from [Email Removed] , a gentleman let me know that I should e-mail it to [Email Removed] and even forwarded it on my behalf. Since then I have had no response whatsoever! I have now sent 6 requests, basically 1 a week and I included a read receipt. The e-mails are being read but ignored. At this point in time I have 2 insurances on the same house and I'm paying for 2 due to no response. Here are some of the people who have read and ignored the e-mails. Juliet Sika Kwawukumey (3x), Ishmael Koranteng (2x), the SIL Customer Care (4X). I even tried copying in the claims e-mail address.... nothing!