Been away for work meeting. About to drive back but my car has broken down. AA can't fix it (they're unable to diagnose the issue) so need to take to local garage tomorrow. Work have put me in a hotel overnight. Have an appointment with cardiology for minor surgery at 7.45 tomorrow morning. Can't get through to hospital to cancel (just rings out) and apparently their phones open at 8. What do I do? Just not show up?