Use query designer starting with the incident/incident object. Open up the incident branch of the tree and add reference number, title and description to the list of attributes on the right hand side of the window. That gives all the incidents. Then find the feedback object which should look like a one to many ERD diagram, open up the plus and add on the creation date itself to the query attributes displayed. This will automatically create a tab for you so that it can display many feedbacks for the one incident. Add more attributes onto this tab.
I've elft out filtering, sorting etc, but it should get you started.
If you get the chance to go on a Query Designer training course or hit the books, you'll be rewarded as queries are one of the key drivers to making LDSD do what you want.
Thanks for support.