Centennial Guest Suite

Guests checked in at 5pm for 3 nights and I greeted them outside. They had a Kayak on the vehicle and were interested in exploring local lakes. After brief conversation, I sent them several locations to check out via text. Somtime that evening they left and did not come back. The following evening I messaged inquiring about their safety and was told they had to cut their vacation short. The suite looked untouched, so I contacted them and asked if they had used the bed or bathtub and they said no. I refunded their cleaning fee. Several weeks later I received this poor review with no comment. I reached out and asked what did not meet their expectations and received no reply. This is a total mystery to me.