to deny users access to the site or any part of it and to decline to provide the services to any user who is in breach of these terms; and/or
(a) i wadu mynediad i Ddefnyddwyr i’r Safle neu unrhyw ran ohono ac i wrthod darparu Gwasanaethau i unrhyw Ddefnyddiwr sy’n torri’r Telerau hyn; a/neu