I was disapointed to hear of your experience, as my wife and I enjoyed a wonderful time there two weeks ago. We could not fault anything (apart from the wasps!). The boat was on time, the staff were welcoming, attentive (but not intrusive) and we had an excellent meal. I would heartily recommend it to anyone looking for a restaurant to celebrate a special occasion.
Hopefully your experience will be prove to be a one off.
PS Thanks to Cathy at the Cafe Pazar for organising the booking for me.