Kinda annoyed at babysitter.

Amanda
I know this may be my fault also but when we decided to have someone watch our son we made it clear that it would only be part time that he wouldn't be there all the time and we wanted someone that we only had to pay by the day. So we found someone awesome who told us what her daily price is and now she's has gotten upset that he was only there 1 day last week so we only paid her for one day. We should've had this all in writing I know I know but we are both laid back people and thought we had an agreement. What do you guys think. Should we have to pay the other days that he's not there?? What do you guys do?