Vitality status wrong 3 times in 2 months

I was the main member on Discovery Health till end of Jan 2015 and my husband from Feb 2015. From Feb 2015 our status was changed from Diamond to silver. Then we alerted them, after a couple of days it was changed back to Diamond, then this happened again. Again we brought it under their attention, again it was rectified, accompanied by an email stating we should be on Diamond and now it is correct. Then we wanted to book flights on KULULA and saw it was on silver again yesterday. Also it was incorrect at the end of March. We also have Discovery Card. So all our cash backs were calculated wrong, as well as the Kulula flights we booked, as well as cash back for Sportmans Warehouse as well as Healthy foods bought at Pick and Pay and Woolworths. This is really a huge mess and has already taken so much time to rectify and now it is even a bigger problem with everything calculated wrong. We are considering quitting Discovery Health, as well as Vitality as well as Discovery Card because this is just too much.