The way I interpret OP's correspondence with A3's CS is that they claim his email address was indicated as where the BP should be sent to. OP says that his and "her" (the "mystery friend") address were very different, thus no typo was possible (first and last -?- initials different). Some questions that are still open are:
- How different were the two email addresses.
- Does the "mystery friend" know OP?
- How did OP find out the "mystery friend"'s enmail address? The BP does NOT contain any email addresses!
...and possibly a few more. With the last name and the Booking reference there is no problem accessing the reservation, both at the CI time and (even worse) changing it completely!