Spin off contract made primary and permissions removed from person paying the bills.

I have been having endless problems with Vodacom, and I think I have found out why, somewhere somehow someone made my MINOR daughters mobile number as the primary number, effectively removing my ability to purchase additional contracts or to upgrade the other contracts aligned to the account. I am so irritated, the last few years dealing with Vodacom has really taken the customer experience backwards. How on EARTH does a spin off number from the original primary number be allocated all permissions and the primary original number lose permissions? My mind is boggled. I pay the bills, the primary number needs to end in 540