AT&T Prepaid calling card doesn't work "already in use"

I am having the same problem.  Only difference is that my phone somehow got halfway activated on a different plan and I have not been able to call out. And this is my first time going through att. I'm considering going back to metro pcs or simple mobile. Smh. And what is my access number? 

Hello, @torigibson39 ! Allow for us to take a closer look into your AT&T Prepaid account!

Before we continue, we would need to ask a few questions to gauge a better understanding of the error message you have been receiving:

• We noticed that you mentioned, "my phone somehow got halfway activated on a different plan and I have not been able to call out.". Have you accessed the correct steps to Activating Your AT&T Prepaid Account Online?
  • Provided in the link above, is the online portal which will grant AT&T users the ability to activate their Prepaid Account Online. To do so, feel free to click the link and follow the prompt to be guided through the activation process.
• Was there any specific step that resulted in you receiving the error message? 
• We also noticed in the passage you wrote, "this is my first time going through att." Have you insured that you were ported out correctly from your previous provider? When and how long ago did this occurrence first happen?
  • Please provide as much information as you can, so we may be of further assistance to you.

We kindly await your response!

Ty, AT&T Community Specialist