Hello @Olga-Aggeliki0,
The host accepted the reservation so he must cancel if he doesn't want to host you.
He may not want to do so as he'll be penalised by Airbnb for doing so.
Not knowing the host's cancelation policy or other circumstances of the reservation I can say that it's probable that you would not get back all of your money if you cancel.
Did you give your real email address to the host or did he contact you through the Airbnb email link? I hope he did as Airbnb will then be able to see his message saying that he doesn't want to host you.
You could try sending the host a request to cancel. If he accepts or ignores the request then he'll be deemed to have canceled and you'll receive a full refund.
To do this go to the reservation in "Trips" and click on "Change or cancel". Then click on "Next" in the "Cancel" section. Then click on the "Reason" box and select "My host needs to cancel". When asked "Did they say they can't host you anymore?" click on "yes" and proceed from there.
Be very careful to select the "My host needs to cancel" reason or you will be seen to have canceled.
If he declines the request then Contact Airbnb support to discuss the problem. There should be a contact link in the confirmation email you received.
You can also contact them as follows.
Type "contact airbnb" in the "Search the community" box on these forum pages where you posted your question. Scroll down a little in the list of suggestions that appears and click on the "Contact Airbnb: A Community Help Guide[UPDATED]" one. That lists phone numbers and ways to contact them via Twitter or Facebook.
Steve.
