Paying for Discovery's Mistake

Since Nov 2014, I have had only problems from Discovery Health. I've requested they re-instate my Medical Aid, sent through my papers and everything that was needed, just to find out they never re-instated my Medical Aid. Since January 2015 I've been complaining about this, and every time I speak to someone new from Discovery that can't help me. I had to apply for a new membership, was given a 12month waiting period for being pregnant in the meantime while all of this was going on, and Discovery refuse to pay for my hospital stay. I spoke to a manager a while ago, and he just said, sorry ma'am, you shouldn't have signed the new membership forms, and you should have disputed this then...after I told him numerous time I have been disputing this since January 2015!! My medical aid was suppose to be re-instated as I sent through the forms in time and never heard back from anyone at Discovery. Now it's my problem to pay for something I wasn't suppose to pay for in the first place, just because Discovery didn't do what they were suppose to do. Don't they care about their customers anymore? Does anyone know what they are doing????