Ikea Bissa Shoe Cabinet for repair (Basingstoke Brookvale RG21)

This cupboard has 3 compartments, the 3rd bottom one has come off the bracket and no longer opens smoothly so needs repairing, photos of both sides of the inside to show the missing piece. Maybe someone would like to have a go at a repair before I take to the dump?
Measurements in last photo from IKEA website.
Collection Times
To be agreed with collector, can be flexible