Just had a phone call from the OR's office saying they have made a mistake and my interview should be today

She was very pleasant about it, there mistake, they sent out the letter with the wrong date on.
She asked if I could do it today, no way as I'm working and my office is a building site at the moment.
So p******d off now could have all been over by tonight, now I have to wait till Monday.
Kind Regards
JOHNNY