Book Hotel Via Ryanair's Site But My Flight Has Been Cancelled

http://www.ryanair.com/en/questions/what-happens-if-my-flight-is-cancelled-by-ryanair

It suggests that if they have cancelled you should be entitled to a full refund as they have broken their part of the contract. However if they offer you an alternative flight maybe the next day or a nearby airport then that could get them out of paying a refund. I would suggect contacting them in the first instance and explain the situation. I would advise not getting angry, try and keep calm and you could be successful as if an assistant gets abuse or a customer is angry with them they will not help you. However from my experience maintaining politeness and a positive attitude you may be succesful in getting your money back. You can also contact the hotel directly and explain your problem with Ryanair and the need to cancel and obtain a refund if that's what you want to do.