I booked a snorkel trip for the manta ray viewing on March 9, 2019, based on advice from the activity centre at the Sheraton Kona Resort, where I was staying. The boat failed to turn up that night and so I did not go on the snorkel trip. That night call visa and informed them that Eka did not deliver on their promse. I call Eka the next day, and the woman explained that the instructions given to me were incorrect and so I was unable to meet the boat. She would not give me her name, and said the owner would call me back to cancel the charge. The owner never called back, and I left the next day to return to Canada. The charge was never reversed and I have reported the transaction to Visa as a fruad. I asked Sheraton to help, but they claim that Eka is independent, and has nothing to do with them, despite the activity centre being in the Sheraton, and them recommending EKA. Avoid EKA as they are irresposible and incompetent.