Remove the telescoping handle assembly by pulling it out of the top of the bag.
This step may take some force. It may help to push down on the back of the bag while pulling up on the outer edge of the plastic handle guard so the screw anchors can move up and out of the holes in the hard backing.
If you are having trouble with your handle, check the pins inside the bag.
When you depress the button on the handle, the two pins on the sides of the handle should retract, freeing the handle to slide.
If either pin is not retracting when the button on the handle is depressed, push the pin into the hole using your finger or another thin object such as a pencil or screwdriver.