You're contract could end at any time, and they won't give you an honest reason why - Underpaid Underappreciated Temp bei Adecco: Mitarbeiterbewertung

Pay scale on lower end for trained technical workers. No free benefits (however, you can elect to pay exorbitant rates for substandard coverage). Even though your contract has just been extended for seven months, about a week or two later, you may get a phone call on the Saturday after your "last day", telling you not to come to work the following Monday, even though you have never missed a day that was not previously scheduled.