[Trisquel-users] consultation

[contacto]

Dear, I turn here because I got tired of sending emails from the contact form  
on Trisquel and never answered any.
Me monthly debited from my credit card money because I give my economic  
contribution to Trisquel, but lately my financial situation is not the same a  
few months ago, and here in Argentina the currency change does not favor us,  
for which I want unsubscribe and stop contributing financially to Trisquel,  
but not how to do it because I contact and nobody answers me.
Does anyone know how to unsubscribe?
From already thank you very much to all.