I had one similar not long since, rang the guy he answered "yo" i asked if he could clean my lounge carpet and dining room, told him it was 100% wool, with lucozade stains in the loung and curry in the dining room and asked him his chance of successful removal.
He Replied " Its not an exact science mi old mate,I will send one a lads round next Tues, they will Hammer it if stains come out they come out if they dont they dont"
Then again there is probably some decent cc's out there charging these prices and doing a decent job!
Mark