What should I do about a cancellation for a drop-in visit due to not responding in a 'timely' manner to an owner's inquiry on Christmas Eve?

I had a drop-in visit booked for Christmas Eve. I met with the owner the day before, met the dog, and went over what they wanted me to do during the drop-in and where everything would be. The owner asked me to drop-in between 4pm and 7pm on Christmas Eve to take their dog out to relieve himself, feed him, and refill water if necessary. On Christmas Eve, I went over at 5pm, took the dog on a short walk where he went both, and then fed him (his water was still filled to just under the top of the dish). About 5:30pm, I left and went back home to where I was going to have a Christmas Eve dinner with family and friends starting at 6:30pm. During the evening, I did not keep my phone on me and didn't check it until our guests had left around 11:30pm. Upon checking my phone I first found a text from the owner at 6:43pm inquiring if I had been over to walk the dog yet. Then I found a voice message from the owner at 6:59pm with the same inquiry. Then a call from Rover staff at 7:26pm asking about my non-response. Finally, a notification that the booking was cancelled and the owner was fully refunded. Upon seeing these messages, I immediately responded to the owner telling them the time I went over, what I did, and a picture of their dog. I have not heard anything in response from the owner. Christmas morning I was sent an e-mail from the Rover staff stating the cancellation was due to a lack of responsiveness/care and that while they rover team looks into it my account is paused. I responded to the questions asked of me in this e-mail and have heard nothing yet in response. So now I will not be payed for a service I did provide and will be unable to book anything new for an undetermined amount of time. Is this really an offense that warrants cancellation, a full refund, and a review from Rover staff?