Went to the wave pool with my 3 children 2 weeks a...

Went to the wave pool with my 3 children 2 weeks ago.We drove an hour to get there and arrived at 3:15.After we got into our suits we played in the pool for about half an hour then alarms went off and we were told we need to leave.The pool was closing down for swimming lessons at 4:00.We can come back at 6:30,but we would need to pay an additional $30.Seriously!!!!!Why were we not told this when we paid.So I just drove an hour so I could pay $30 to swim for 1/2 an hour.
When we left the man at the desk said that someone should have told us but there was nothing he could do.We called the next day and they said they would call us back.It has been 2 weeks with no phone call.
HORRIBLE CUSTOMER SERVICE!!!!!