Was the pastel crayon in your clothes pocket and did you wash it? Do you think the thing is irretrievably damaged? No!
Steps

Step 1. Find any remnants of the melted and crumbling pastel crayon

Step 2. Spread stained clothing on the floor or table

Step 3. Spray the stain remover on the crayon stains and let sit for 20 minutes

Step 4. Put your clothes in a bowl of water
Add 1 cap of liquid laundry detergent or 2 tablespoons of regular laundry detergent to a bowl of water. Mix water and detergent before placing clothes in the basin. Make sure all clothes are covered with water, leave soaked clothes for an hour.

Step 5. Wash stained clothing in warm water in a washing machine with bleach suitable for colored items

Step 6. Wash normally

Step 7. Rinse in cold water

Step 8. Repeat the wash, this time adding only 60 ml of bleach for colored laundry

Step 9. Before drying your clothes, check for stains

Step 10. Repeat all steps until the spots disappear
Advice
Before washing, make sure you remove all residues of pastel crayon from the drum of the washing machine
Warnings
- Do not use flammable cleaning agents near gas burners or open flames.
- Your clothes may shrink when washed in hot water.