ICEPlus panic button services bad admin response

This is a complaint regarding their admin, not security response services. I have tried to contact ICEplus 3 times via email and spoken to them twice telephonically to get them to cancel my panic button services.(https://www.iceplus.co.za) The emails have never been answered and on both telephonic conversations I was promised they would 'get back to me', but I have heard nothing. I pay the monthly levy via stop order and so need them to cancel this account. Skeleton staff or not, there is no excuse not to respond.