Tried that hippystuff1 - still didnt work, but have finally heard back from Oculus who say that I have to give it another 7 days before the wrong oculus account is fully deleted, then I should be able to merge the two accounts I do want to keep. I'm slightly sceptical but keeping everything firmly crossed!
This issue was easily foreseen, and completely avoidable. The fact that they implemented the Facebook requirement at the same time as new hardware release set themselves up for failure. I also don't think they did much, if any testing on account merging.
Additionally making a piece of hardware completely unusable without a social media account is just not right and may prove to be illegal at some point in the future.
Im seeing in review vids etc that a lot of these issues are being sorted quite quickly now as Oculus catch up.