Absolutely Poor Service and Even Worse Communication!

I've been a dependent on my mother's medical aid for years, but I was terminated when I turned 21 in May. However, after providing proof that I'm still studying, I asked to be reinstated. After numerous emails and calls, I was told I was back as an active member. But when my mother tried getting her chronic medication using the medical aid she was told it wasn't possible since I was terminated. After 3 months of trying to sort this out, we are told that my fee has increased since I'm now an adult and my mother can't get any services until my part has been paid, even though she's been paying the medical aid monthly. Now she's expected to pay the increased amount (over 3K), which has accumulated but we were not notified about it. Throughout all the calls and emails I sent and received, none of these changes were ever mentioned, it also doesn't make sense how the main member can't get services just because of the dependent.