Charged for an xfinity mobile line that was NEVER ACTIVATED?

​​I’m being charged for an xfinity mobile line that I never activated. I did try to activate it but the website gave me error message after error message so I cancelled the order and the agent told me everything was taken care of. I guess not since 1 month later I am being charged. The bill is claiming line activation fee and data usage even though you guys claim to have a ‘free activation’ (even though I didn’t even activate the phone) and how am I going to get charged for data usage when my phone wasn’t even activated in your network? I’ve read through multiple customers having the same problem and it seems like xfinity is just trying to charge people under their noses.​​