Hi Nicolas,
Thanks again for message. I think HikaShop is a great product, and I appreciate it's very good value. I'm stuck on how to solve this. Akeeba say they don't handle the payments with this plugin, that's all done by HikaShop. I had a look at the paypal API and that seems to include a way to suspend the account remotely, which I think is what I need. Anyway, I'm wondering about the best way to proceed, is it possible to get support from the team who wrote the akeeba subs plugin for you? I'm happy to pay for support, but I can't work out if there is anyone who can help! Sorry to sound confused, I know this is a new plugin.