Looks like the bumper plastic mounting have bee torn off. If it uses screws to join the bumper to fender that mean the plastic around the screw hole(s) have been torn off. If that's the case, then you can probably loosen the screw joints, push the bumper back into place, and retighten the screws. Hopping the screw can contact the remaining bit of plastic around the hole and hold the bumper in place.

If that doesn't work, then choose either professionally done or desperate McGuyver style?

it cost around rm10++ for the side bumper bracket

Well then, either repair it professionally by using fibreglass to patch up the hole and drill a new hole to mount the screws, then putty and paint the exposed fibreglass patch (if it can be seen).

Or the desperate way is to use bonding epoxy to fill in bumper gap, then push in the bumper and use clamps/clips & lotsa masking tape to hold it in place while the epoxy cures.

Im at Sabah
Shipped from west to east malaysia