That's the address for P & O , the Princess one the O P used is for Princess. That address would probably get there eventually but might go round the houses a bit.
A couple of points that I have missed out before, make sure the proof shows an up to date date on it, your name and the number of shares. We have always had an automated response immediately saying it has been received and then another e mail between a few days and just over a week later saying OBC has been added. If there is a problem with the proof we have had an e mail telling us what is wrong.
If you never got the automated response the same day you sent then I assume it never got there. Try sending again and re typing the e mail address , not copying it, in case there was a problem with it.