Azure App Services Service Plan Upgrade mistake

Before anything, I was and I'm still able to manage Azure AD. I'm working for a new organization.
I've try to connect to Azure App Services.
The only option I get was to start a trial.
I've thinking that the trial will detect that I am Global Admin. After I realised that I have and [Upgrade] button in the top left that appeared. I may have configure my Azure has a trial. How to linked it correctly with my tenant (no more Upgrade button. I pretty sure it's another Global Admin in my team that has already enter credit card info).
When I use Subscription, I saw that I don't have "Pay As You Go" checked. After I checked it, I finally saw the App Services I need to configure.