My viva is yesterday and one night before that i was told my viva is cancelled due to examiner sick

I have been prepared so long for this, I feel very annoyed, i wonder what i can do here

i crying for whole days, it has been four month since i submit and they told me i have to wait at least three weeks for the person to recover
is there way to regulate the sudden sickness of the assessor which bring huge damage to your life and life plan