UNWILLING TO HELP

I wanted to join my wife to Medihelp. I phoned medihelp and got the application form I phoned for further assistance to fill it in I put my wife as the main member and accidentally added myself as a dependent thinking it was a contact encase they couldn't reach my wife. A couple of emails went back and forth to get the application through and eventually I got no replies to my emails so I figured all was fine. Next thing I knew we owned them for one member and a dependent. I went through the application form and saw the error I contacted them and asked them to please rectify the issue they told me that they cannot talk to me as I am not the main member. So my wife inquired and they said its fine we must email them with a signed letter and so we did I also asked them to start her membership the next month from May to June. Now they are refusing to help us any further and they said they will not help us unless it is their fault. I understand this much but we never got a confirmation order or a phone call to tell us what will happen next. All I want is for them to move my wifes member ship to June and we will gladly keep paying.