After that, lubricate the zipper slider and teeth with a light silicone based lubricant. As a temporary measure, tie the strap that has broken into a know with its broken counterpart. To replace the strap, see the spare parts section. Contact Napier, we may have a fabric swatch we can send you to repair it with. See the spare parts section.
Shock cords run from end to end through the poles.
By removing the end caps to the poles, as a temporary measure, you could re-tie the broken cord shorter. After that you can purchase new cord at the nearby outdoors shop or order a new pole. See the spare parts section. Stains will usually not affect your tent's performance. If you can't stand the stain, attempt to remove it with a damp cloth and a very, very mild detergent.