A sliding door Damaged tracks in Isle of dogs

This is a sliding door in the Isle of dogs E14 which has damaged tracks and also damaged wheels. This has been caused by the support Lowering underneath the actual track. The base underneath the doors will need to be wedged And raised. As shown in the pictures the top of the doors have lowered dangerously to the point of collapsing outwards. The wheels will need to be changed and also the track which has been damaged by the scraping wheels. Also as shown in the pictures a section of new track which will be the replacement for the old track.