Thanks so much for the help but unfortunately I DONT use Apple icloud because it is too expensive, i just back up to my PC using Apple Itunes and now the new Apple device backup. I am disappointed with Apple support , they did confirm that this had happened to "other valued customers" and they said I should have backed up to icloud so I came away thinking it was all my fault with loosing all my data instead of possibly some hiccup in the version update.
I have just returned from my overseas holiday so next week I will be attending the Sydney Apple technical support to see what they can do . But , I am guessing I will have to restore from my 4 month old backup and see what eventuates with that . Lose of current Ipad Pro data from a regular software upgrade should NOT HAVE occurred in the first instance.
Thanks again for your help. Greatly appreciated.