Hi Mark,
It is very difficult to give a verdict without seeing the offending carpet as there are so many different factors involved, so we can only guess at what the problem may be. Wool will smell like wet sheep when cleaned, and if you have an area that has been subjected to excessive sunlight that can make it smell even worse, ie patio/french doors etc. This should go when it is completely dry. Your best option would be as Mark suggested, call the firm who did the cleaning and raise your concerns. If they are a reputable firm they will be only too happy to resolve the situation.
Derek.