Problems contacting The Guardian about advertising

Hi all

I wondered if anyone else is having problems contacting The Guardian to advertise your volunteer vacancies?

I've been advised that they will do this free of charge and to contact sales@guardian.co.uk - which I have tried to no avail. I have then tried jobs.help@guardian.co.uk (through a link on their sire so definitely spelling everything right) but again I am receiving an error stating that my email was rejected.

Has anyone else encountered a problem or know of a way to contact the appropriate team to sort out advertising?

Many thanks in advance

Carrera-Leigh Spence, Volunteer Coordinator for CRI Camden Services