Sears carpet cleaning sucks

I wish this was going to be a glowing endorsement of Sears carpet service, but it's not. They came to clean ours and they did get rid of the little stains we had around (but a lot of them came back a few weeks later) but they left an even bigger weird, giant rust-colored stain on the living room carpet:

Since they have a satisfaction guarantee, I called them to come and fix the stain. The lady on the phone told me that sometimes their cleaning fluid can leave a stain if it's not rinsed properly. There's a long story here involving me coming back from vacation early to be sure to be home for them and them canceling at the last minute and rescheduling for a week later. We'll pretend I bored you with those details. Anyway, then when they did come, the guy told me "we could not have done this. I know you spilled something after we left but I'm going to clean it anyway". I got really mad at this because of course we did not spill anything. Also, we left the house for 4 hours (he said it would be dry by then) and it was not dry until 2 DAYS later.

Anyway, he came back a second time, to clean it again, and he told me that this time he believed me that I did not spill something after he left, but that it must have been an old stain resurfacing. If we didn't have stain there, then the previous owners of the house did. Huh?! We had the carpet cleaned professionally before we moved in, we didn't see a stain before that at the inspection, and in the 3 years we've been here we've also cleaned the carpet ourselves 2 or 3 times. No stain, ever, until Sears showed up.

So, $188 later I am....grrrrrrrrrrrrrrrr..."mad" is not the word. They have been here 3 times and the stain is WORSE, not better. But of course, *I* somehow spilled something or the previous owner (a professional woman who traveled frequently, had a cleaning service here once a week and kept the house spotless) must have spilled something which is now rearing its ugly head.

Oh and for a longer postscript: why does it seem like our place is small until service people come and act like it's this enormous mansion? They charged us more than the quoted price on the phone because they said our living room & dining area were 2 separate rooms. Then they don't have a price for cleaning 4 rooms, only 5, so it jumped up $50. BTW, for those who don't know me, I live in a 1200sf condo with 2 bedrooms. No "garden room", no conservatory, nothing fancy. Just 2 bedrooms, a living/dining area, and stairs and a hallway for them to clean. The bathrooms & kitchen don't have carpet.