Some interesting replies....
All FTL schemes worldwide assume proper rest prior to reporting for duty. The company does it's part by complying with the scheme which it seems to have done in this case.
The question is what affect did the phone calls have on you in the rest period prior to duty?
As a licence holder your primary responsibility is the preservation of flight safety.
If the calls prior to duty (or some other influence) disrupted your rest to the point where your "reasonably held belief" was that the duty you were being asked to perform would be sufficiently fatiguing to significantly affect flight safety then you would be committing an offence by completing the duty.
This would likely only become a problem for you if you had an incident and during the subsequent investigation it became known that you held this opinion prior to reporting for duty.
It's legally almost as silly as turning up for work drunk or under the influence of other drugs.
