North America, Sage X3 & Sage Fixed Assets

Hello,

I'm new to my company and am in charge of reining in our Sage products. However, due to turnover and over-reliance on 3rd party support, I'm left in the dark on many things. I discovered recently that many of the contacts listed for our account are outdated and some go to the personal emails of former employees. I'd like to change this as soon as possible, so our reseller guided me to the Sage Customer Portal and mentioned 'Portal Administration' for maintaining user accounts. However, I see no tab that would allow me to do so. My guess is that I don't have the proper user rights and there's an inactive admin account lost to time.

When trying to get in contact with Sage Support, I'm stuck in limbo because the web chat is discontinued and the phone support just tells me to look online. 

Any support would be greatly appreciated.