Hi there and welcome
Before you did the update, did you do the backup via itunes on your computer?
Please let me know.
ok, the only option you will have then is to attempt to run a recovery program. It is always important you first backup your phone before doing any updates, but you still may have a recovery possibility.
Download Wondershare here
Click me to open
Then run it on your computer and connect your phone and let it scan.
It will charge you but its the only program available that is capable of doing this. You only need to purchase the program when it says it has found the notes to recover.
Let me know how you go please.
If you have and problems, or would like any additional information or assistance, please do not hesitate to let me know.
And if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.