A bleach spot is more of a "repair" emergency than a "cleaning" one. Bleach doesn't just stain the carpet, it actually removes the color. Once the color is gone, no amount of cleaning will bring it back.
If you spill bleach, try to neutralize it immediately with a mixture of water and a little bit of dish soap to stop the chemical reaction. But for the color loss, you might need a carpet repair. We offer seamless patching and repairs for those moments where a spill is permanent. We can often take a small piece of carpet from a closet or an inconspicuous corner and use it to patch the bleach spot so you never even know it was there.