I do hope that they do compensate you in some way. However, I do think it is a long shot. I usually run a load of towels through before ever getting to clothes when on vacation. I don't do it on purpose, but I can see now that it also prevents our clothes from possibly getting ruined.
If housekeeping were expected to run a washer cycle between each guest, that would use up a lot of water. Plus, what if the previous guest never even used the washer...then running the rinse cycle would be even more a waste of money.
It is a reasonable expectation, but I put it up there with my having to wash the dishes before we use them, clean the whirlpool jets, and some other anal retentive stuff I do to make sure I am comfortable using the stuff in the unit.
I am sorry that it happened to you though.