Poor service and communication

I recently married and want to go on my husband's medical aid from the start of March 2022. I filled in the form in January and his employer submitted it as his employer deals with the medical aid as a company. I emailed on the 17th of March 2022 to find out if I am on his medical aid and still haven't received any feedback. My husband received an email on the 18th of March saying that I can't go onto his medical add. They only add dependents in January each year. In the meantime I cancelled my medical aid as I need to give 30 days notice. I can't understand why we don't receive any feedback regarding the addition of a dependent and when we receive feedback it is half a month later. I can't understand why it is so difficult if we both are members of the Discovery Health medical aid