Sears Carpet Upholstery & Air Duct Cleaning

I had my carpets cleaned 5/16/09 , I had all the rooms cleans and treated for stains at the time they offered me a maintance agreement, they told me I could have 2 more visits as i just had, sounded great to me. I called for my carpets to be cleaned as I had done before telling them I had the maintance agreement. They said no problem and came out, once they got there they tried to charge me for stain resistant treament, I told them i had the agreement but they said it didnt cover that and wanted another $85. I called the service people and they were rude saying I should have read the agreement and not listen to our people! I will NEVER EVER use sears again, they did a bait and switch to get you to purchase their agreement and change their tune when you try to cash in, BEWARE