They do not want payment

I received an invoice for money outstanding that the medical aid said to me they will pay. I spoke to the medical aid and they said that the hospital had sent them incorrect information about my stay, which is why they have not yet paid the hospital even though they want to do so. They have also said that the hospital is supposed to contact them directly so that they can be paid.

I wanted to e-mail Life Healthcare's billing department to tell them this but their system simply blocks my e-mails, no matter which address I try. How does Life Healthcare expect to get their money when they will not let me e-mail them information and when they have allegedly not provided the correct information to the medical aid about my stay to them.