Unhappy - poor service

I booked tickets online for the 12th January 2019, when we got there, the place did not have power they let us in and none of the rides were working so people could just swim in the wave & other smaller pools but no slides. We were 3 adults and 6 kids they were super exited to do the slides. We could only spend the day from 9am -3pm at the place due to other commitments and because the rides were not working the people at the gate told us that they will refund the tickets if the power was not back by 1pm. The power only came back on after 2pm. when we had left, I left my contact details with the front desk staff that promised a Manager will contact me on Monday morning. I waited for a call no one called. I tried calling the number on the web no answer. I decided to write an email in this regard, to date no reply to my emails nor any phone call. Now they were supposed to give us complimentary tickets because of no fault of ours our kids could not enjoy the slides or the day as planned. No feedback, no response, this is not right its allot of money just for swimming pools. Please help