I did one job and sent off an invoice with 30 day terms. Then I did a second job, but I've not yet invoiced for that as I'm waiting for the author to answer some queries.
Payment was due at the end of December (after 30 days had passed), and I've emailed several times and left phone messages.
I followed your advice and decided to give them one last phone call before I went down the claims route. Anyway, my contact refused to come to the phone
but this time at least passed a message onto the receptionist to say a cheque will be posted at the end of the week. I get the impression I annoyed them by having the audacity of not getting it when I'm being ignored, but tough - I'm a sole trader and can't afford to give out free credit. Looking forward to seeing how the next invoice goes ...