I've been having trouble with podcast garden, turns out they're a really unprofessional outfit; more than half the time their website is inaccessible, and they have poor customer service. Also, they've taken a lot more money off me than I agreed to and I've opened a dispute with PayPal, hopefully they'll sort this all out.
In the meanwhile, I've spent the last couple of days migrating to a custom solution, I honestly don't know what I'd do if I wasn't a software developer. The Shakespeare's Sonnets Exposed podcast is now being hosted right here on industrial curiosity, and not only am I no longer at the mercy of other people's incompetence, it's a much cheaper solution, too!
Now I just need to find the time to make my solution easily available to the public...