Cancelled without confirmation

Momentum has cancelled my fiance's medical aid with out confirmation as to why. No grace period was even given, ni contact was made to her. Nothing. Simple reason was she forgot to transfer money to her check account from her savings account. 1 premium did not go off. Money was transferred to the account only to find out the medical aid was cancelled. What if something had to happen to her? Absolutely disgusted by this situation. She is no medical aid at the moment because they want her to reapply. Unacceptable from a company such as Momentum.