Renew Microsoft 365 Licenses.. ( Without passing trough a "Partner" )

Hi,

I'm helping an NGO that need to renew their Microsoft 365 License...

So we can see the active one under (in admin.microsoft.com )

home\Your product - Product

But no option here to renew, only to contact a previous "Partner" (this option is a no go)

in home\Purchase services\Product details it seem we can buy new licenses...

But their no indication if those licenses will start after the previous one !? If the users assigned to the previous license will receive the new one automatically etc..

Of course I went to the help section, but either it's a FAQ (where my question is not listed... of course...) or it's a link to the partner.. but not directly to Microsoft...

If you have any clue, I'm all ears. :)