You can lead a horse to water...you must be pretty thirsty now Peter. Having seen the pain these situations cause, nobody has more sympathy for you than I Peter.
But you are not listening. You were advised exactly what to do weeks (around 3 promises?) ago and you have not accepted that advice. You need to ask WHY this big, secure, professional company won't simply hand over this insignificant (to them) little piece of paper (from hundreds they have sold).
As every day goes by, others have positioned themselves to the front of the queue to try and ensure that if only a few get their paperwork, they'll be one of them. You are going further and further back in said queue, despite the advice of people who really do understand the process and situation better than you.
I wish you every success in getting what is rightfully yours (you paid for it, that normally means you bought it), but this topic is like Groundhog Fortnight and you insist in keeping it that way while your investment slips through your fingers and you stand watching it go - so with some regret I must say that this will be my last comment on the topic. Good luck, with every day that passes you need just a little bit more.