Welkom Yizani not helpful with my enquiry

I bought the Welkom Yizani shares back in October 2006 and I am still in the dark regarding my shares. Recently I have been trying to find out what is happening and I was told they cannot find my details and I must send proof of payment, which I did. I had to wait for them to come back to me of which they didn't. When I called them again they told me the same story that they cannot pick my details up from their system and that I must send the form I filled out when I was buying the shares. I sent the form and again they kept quiet. To cut a long story short, I have been trying to know what is happening regarding these shares from the 23rd January 2015 till today and all I am told is to send one document after another. I have sent many emails. I get a promise that someone will get back to me and nothing happens. What frustrates even more is that everytime I call I have to relate the story over and over again. This is horrible service, I wonder how many other people who bought the shares are going through the same run around.