There are a few things here that just don't make any sense first of all €36 to clean a 3 bed townhouse, including laundry is ridiculously cheap and I think that both you and the service provider have benn a litte niave, I vcertainly would never quote or accept a price based on the number of hours, it is an open cheque book
Includimg linen, if your are ironing the sheets 6-7 hours is about correct, you cannot dry the linen any sooner, also the price should reflect if the linen is being taken away or washed in the owners premises
Cyocat what you have not said is if the person wants paying for the additional 8 hours or if they have just accepted the €60, which again is cheap for that service, but if they quoted a price based on 2-3 hours that's the price
Next what is the level of clean that you requested, basic, inside and out, including windows, oven etc, is there anybody there to check the work
Next question, is this person somebody you know, have you seen their work, are you happy with what they have done and of course do they have the keys to your property
Finally of they are working legally there is the small matter of the 21% IVA
I believe that given the basic posting that your question is unfair and that you need to be more careful when you select a service provider