Many of the England Squash supported systems include your ES membership number along with your results and that is picked up and added to your profile information as your results come in.
If your ES membership number is wrong then you can correct it along with your other player details by clicking on the three dots near the top of your profile page which will take you to your player admin page. If you have had to correct your ES number it's probably a good idea to also lock it so it doesn't update as future results come in. It would also be a good idea to have your ES number corrected on the system providing the results.