Liberty Medical Aid Rip off

In 2016 I had a baby whilst on the Liberty Medical Aid. I submitted the requested information such as baby's Birth Certificate to Liberty to add the baby on medical aid and up until present my baby is still registered on the medical aid however I a receiving debt collection for the delivery although this was supposed to have been paid up by the medical aid. In January 2017 the medical aid migrated over to Bonitas and now Liberty is not taking accountability to resolve this even after emails being sent to them. I am now faced with a R13000 debt that should have been paid by the scheme. Total rip off company and I will never recommend them to anyone due to the poor ethics and distasteful service. Even the hospital is confused due to the migration as each provider is passing the buck on each other.