Who to I talk to at Rover about issues with the dog sitter we had?

The sitter who stayed at our home I thought would be a great fit. I left the dogsWe came home to our house smelling of dog pee and poop and urine stains on our wood floor. The sitter mentioned that there was one accident but when I entered our bedroom it smelled of dog poop and urine which we could not locate right away until I lifted an area rug and it was completely soaked with urine and was on the floor.

I guess it explains why she was in such a hurry to leave.

Please advise on what the best solution to this issue is.