4 months and still trying to cancel policy

My dad Simon and I have been calling clientele for the past 4 months. He has been sending request after request call after call wanting to cancel his investment plan. On the 6/12/14 we got sent cancellation forms by Lindiwe which we sent back to clientele and since then there has been no feedback. This month alone we spend over R500 on airtime with the call center they keep putting us on hold then dropping the call. Since all calls are recorded can clientele please pull all the records and listen to them and management advise as to why it's takes 4 months to cancel someone's investment plan. I willingly forward all emails from clientele. For a company that prides it's else for putting their customers need first you sure are giving yourself a bad reputation.