You would have to be listed as an authorized person on the account, not just on the account. The primary can list the people that are allowed to make upgrades and plan changes. If you are listed that way, you can do the upgrade. If not, you will need your father or whoever is listed as the authorized person to make the upgrade.
This is a user to user forum. I am a user, just like almost everyone else on the site.
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.