Poor Service Delivery

I have been battling for nearly 3 years with Mibfa to pay out my surplus monies. I keep phoning and when I eventually get through to explain my case, the call centre agent then puts down the phone. I enquired by phoning them in February this year, the guy on the phone told me that I am listed as deceased on their systems. I was told that they will get back to me and I am yet to recieve feedback from them. I have followed the necessary process by posting my documents, bank mandate, etc and still not response. Can somebody please get back to me. I am so fedup now.