On the verge of cancelling all my discovery products with the continuous poor service.

I have been having issues with my points tracker not accumulating points since I first signed up. I even linked my gym with vitality only to find that is also not tracking my points with every visit. I have had to call in to discovery to try resolve this since beginning of August and dealt with 4 different consultants after which my issue has still not been resolved. The first three promised to call me back only to end up waiting for a call that never comes. This is not the level of service I expected joining Discovery. I am not receiving the benefits even though from my side I have followed all the instructions. I am at a point where I am ready to just cancel all my Discovery products including insure since I am still awaiting the cashback for August. I have had so many calls dropped with not one consultant bothering to call me back. A case that makes me feel like I got the best service in the beginning just to get me signed up and get my monthly payments with no service thereafter. I literally just had a call dropped now and yet again no one bothers to call back. I do not understand why it is my responsibility to chase up on these issues when I should be getting a service which cis currently non-existent.