Be polite and always make something up to sound like it's not their fault (like I've had a few posts gone missing so just checking if you've got the invoice because nothing received so far...) Also, be persistent and they'll pay to get you off their backs.
Be polite and always make something up to sound like it's not their fault (like I've had a few posts gone missing so just checking if you've got the invoice because nothing received so far...) Also, be persistent and they'll pay to get you off their backs.