I did an "information subpoena" years ago for information relevant to a Small Claims suit. It seemed pretty straightforward.
In response to the second question, it was a landline so there should be evidence of a phone call to me and the call's duration, I would think.
I didn't get an itemized bill. I always paid by phone a small monthly fee and never had much motivation to see the itemized bill until now; they CS guy found the 18 hour call
and read off the details to me. Lower-tier people at the company want to help me it seems, but higher-ups are unexpectedly denying the credit after it gets recommended.
When I asked why I was paying for a call made to me they went off on some tangent about it being a "collect call"--a term I have not heard in years,