@Andrea4277 First timer huh? You really need to rethink what you are doing. It looks like you actually live in this property yourself given all the personal effects, dishes in the sink, shoes in the kitchen, iPad on the table and photos around. Are you planning to be away for a time so think subletting it as is will work for you? Think again. Are you ready to see all your possessions being loaded into the back of a truck while you are away? Or your house and belongings trashed?
Your bed 2 - This is not an acceptable standard of accommodation for adults. The chances of getting a permit for this are around nil.
The short answer to your question however is... you can't cancel a reservation without incurring a penalty fee yourself (deducted from your next booking, if you get one). Good luck.