No feedback after service plan cancellation

All was well with Nedbank MFC till I opt for an extended service plan early this month and then immediately realize I do not need one as I have found a cheaper service centre to do my major service on my Nissan Tiida. I then decided to call them within 30 mins of taking the cover but I was told I have to call the next morning since the policy is not yet registered on the system. I called the next morning and immediate cancelation was lodged. Then after I was calling every week to see how far is the cancellation but was told it is in the process and I will be getting communication via mail the following day. Up to date there's no communication and it is almost end of the month. I called and spoke to 2 people this morning who hung up the phone without giving me feedback. They only told me to hold and then hang up. This is the reason why I have used this platform in demand of feedback.