Xfinity Live Support Chat potential scam?

Hello,

I wanted to reach out for direct help about a strange interaction I had with Xfinity customer service. Our neighbor's plumbing contractor cut through our service line so I contacted the live chat to try to get a technician sent out to inspect and repair the line ASAP. The rep I was connected to successfully moved me up the waitlist for this issue -- great!

However, they then told me about how I could save $30/mo on my overall account bill by accepting a free phone + line with Xfinity Mobile for 24 months. I accepted this offer, and was directed to:

-Fill in a secure link (domain was iguard-po-1pp.slb.comcast.com) with my social security number (SSN) and date of birth (DOB)

-Select a new phone number I'd like to use via the 'TextMe' app (a 3rd party app from the app store) and provide it to them

-Fill in another secure link like above with billing infromation, to cover 'one time sales tax'

Unfortunately I completed the first two steps before becoming uncomfortable and disconnecting from the chat. I am now quite worried that somehow I may have been communicating with someone who did not represent Xfinity or was also phishing for my personal information. I have a transcript of the chat which I can provide upon request.

Can an Xfinity representative confirm whether or not this was a legitimate request for information? I have seen several similar requests on this forum with poor responses and it would be good to know if I need to take steps to protect my identity. If the request was legitimate then I urge Xfinity to create a less skeevy looking information portal...

Thanks very much in advance for any help you can provide.