Poor customer service

The customer service at sizwe medical aid is the worst.ive been trying to solve a rejected claim from January,is now been 6months with no help.they are always offline when you need answers.my claim was rejected the reason being the code used is wrong.only to find out the code is correct, is been changed medical aids regulation since January and sizwe ddnt change or update it on their system.i made them aware and they acknowledged it and ask me to resend the claim but they keep rejecting it for the very same reason.i sent them a number of emails with no response.i tried calling with no luck.i being sent from pillar to post is so frustrating because I'm getting letters from the reffering Dr's for the unpaid account.my overall experience with sizwe paying claims in the past is been a pain.they are forever offline