An account was created but when i log on it says that this account does not have a company linked

It's my priority to help you log in to your QuickBooks Online (QBO) account, Anjo. 

Beforehand, what kind of user have you added? Additional information would help me provide an accurate solution. 

 On a different note, this might be a browser cache issue. To see if this is the case, we can use an incognito or a private window: 

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Safari: Command + Option + P

Log in using the correct credentials, then check to see if you can access your company file. Go back to your regular browser and clear its cache if you can. Close and reopen it after doing so. 

 Hoping to see you again in the Community space. You're always welcome to post any questions about QuickBooks Online.