Switched to T-Mobile, Need Information from Xfinity Mobile!

Hi there.  I switched from Xfinity Mobile to T-Mobile because the service was horrible at my house.  Verizon is equally bad for obvious reasons.  I would gladly go back to Xfinity if the service was better there.  I did everything I could to stay, but it wasn't working.

Here's the hard part, no one from the Xfinity Mobile chat customer service will give me the information that I need to get the Rebate from T-Mobile for switching carriers.

Here is what I need from Xfinity Mobile to get the rebate:

What you'll need:

• Installment Plan detailed screenshot for each device being submitted, each image should include...
• Submission must be at least 90 days after you began service with your previous carrier
• Remaining balance owed
• Device make & model
• Associated phone number active on device

Does anyone know how to get this information from Xfinity Mobile so that I can submit the proper information to T-Mobile to get my rebate from them?