Sorry Pioneer, I'm not sure where you're coming from with this? I spoke with Google through their call-center, I haven't contacted any plugin developers and this is my first ever attempt to seek advice on WP. No one had access, no one installed anything and no one made changes - they simply remote viewed my settings as displayed on WP. Thanks for you help at any rate.
I'll have to look into seeing how I can find out if I've installed bad code.
If anyone else reads this - if you have any advice you could share that would be great thanks.