Bonitas suddenly changes my option

I started out with the Bon Cap option until end 2014 (membership number ***). I switched over to the Standard Option in January 2015- Since then I have been paying R2700 per month. In December 2015 I switched to your Standard Select option (Membership number ***), and this was once again the biggest mistake of my life. Bonitas miss-communicated information about this option. It was only in Jan 2016 that we received a letter where it states that I have a 30% co-payment when I go to the hospital. <br> When we realised I am going to have a 30% co payment we immediately switched me back to the Standard option in the week of 11 January. I received an authorisation number for my operation and a membership certificate that I am on the Standard option. I went to the hospital and now they do not want to pay as they communicate to me that I am on the bon Cap option! I Paid R2700 per month since Jan 2015, how am I suddenly on the bon Cap? They keep on emailing me and phoning me to confirm that i am on Bon Cap, but no one gives me feedback.