Sanlam service is disgusting

I have numerous policies with this company. Firstly they did not honour the agreement I made with them as to which debit order day I preferred. Sanlam debited my account on an inconvenient date creating huge bank charges for me. I tried to communicate with sanlam telephonically but I list more money trying to call them. They are unreachable. I then emailed cancellation forms to Sanlam in January. The responding email was my application has been received and I would be contacted. This has since not happened. I then visited an Estcourt branch to change debit order dates. Signed conirmation of change of debit order dates to my preferred date. Thus change has still not been honoured. The cancelled policies also continue to debit my account multiple times. I have blicked the debit orders but they continue. I am very upset and feel as a consumer I have been treared unfairly.