Are you sure you're not mixing up their landline and mobile rates? I'm seeing 22.7c in the right-hand column
You might also check the rates on the Betamax VoIP services, around €0.12 per minute.
http://backsla.sh/betamax
Voipbuster has a nice Java client that uses wap/gprs, with the facility to change the called-back number, so if you can use a landline (6c) part of the time ...