Walkies

Been out today with my daughter and her two puppies Merlin the Lab is 10 months old,and Saber Doberman 4 months and a bit,
I had missed a call last night from the admissions from the hospital telling me to phone the department,which I did this morning at 9am and you get an answerphone message to leave your name hospital and hospital ref no.and they will call you back,so far no call back.so I called the switchboard to put me through to the dept,and guess what I got an answerphone message just the same.so I left my name and details again.. my op is for thursday what could they be ringing me about.......