hope to get a person to answer me

i am handling my moms medical aid, i had a person of \high authority"in the call centre tell me a while ago that the only reason my mom's medical aid details are incorrect is because the DR/SERVICE providers keep putting the wrong details on the account. Now i am happy to say that MEDSHIELD are the ones to blame here. I have notified the medical aid on numerous occasions (too many to count!!) that my dad is DECEASED. He no longer is a main member of the medical aid!!! BUT STILL MEDSHIELD insist on putting him on as a main member and my mom as the DEPENDENT. She has been the SOLE MEMBER since 1/4/2014. HOW MUCH CLEARER OR MAYBE SIMPLER do i have to put this. All her authorisations say that she is the DEPENDENT member!!! CAN'T YOU PEOPLE GET THIS RIGHT - ITS NOT THAT DIFFICULT - MY DAD IS DECEASED HE CAN'T HAVE A DEPENDENT ON A MEDICAL AID WHICH IS NOT IN HIS NAME! Good ness me!!!!!! Where are you going to put the blame now that it is YOUR FAULT."""