Multiple drop offs on the call centre line

I have been with ABSA Activate for over 2 years now and I have contacted them on a few occasions to update my details however to my surprise when I finally got through to the call centre agent she told me she had different details on the system which I previously called to change and was advised that it had indeed changed. Needless to say I called 3 times and held on for over 15mins on each attempt just to constantly be cut off before actually speaking to someone in the cancellations department. Before my attempts of yesterday I spoke to someone on the 16th who assured me that I will get a call back because the cancellations department is experiencing high volumes and to date I never received a call back that’s why I decided to try again yesterday which was an even worse experience. Can you please just call me back I want to cancel my policy.