I re-checked what I received from BA for my ex-CPT DONE5 back in January
and yes - no e-ticket numbers were received

So I must have gone onto checkmytrip.com to get them (in this tool you have to expand your details to see the numbers)
Since it's BA-issued the numbers will begin with 125- and depending on how many segments you have in your itinerary you could have up to four tickets and checkmytrip will show the sequence at the end of the number, for example mine shows 30-33 meaning the sequence of four tickets ending in 30, 31, 32, 33.

I of course noted the ticket numbers in the spreadsheet I have for the trip. I also took a copy of the fare rules from the Oneworld web site as these are the rules that will prevail for the life of the ticket.

Congrats and well done, your perseverance paid off