J R.

I bought an expensive, ambitious module to solve prestashop checkout's shortcomings.

At first it worked, but soon there was an error message saying "update". The module would not update on my server. It also stopped saving any changes made from its own control panel.

Support was hard to find on the Knowband web site. You need the yellow balloon icon.
Refund requests have a different screen and are not replied to.
The support screens required a lot of FTP and logon details, but refused to save them, so I sent them in plain text, to allow them to try to solve the problem. Knowband support staff did manage to save individual changes on the module but not to make the "save" button work. I believe it is something to do with whether php is allowed to open files on a server, but they would not comment on that and pretended misunderstanding or obfuscation, asking for an on-screen video, and later closing the request attached because they said they'd already replied. I've asked for a refund for paypal.

If Knowband staff were allowed and encouraged to admit what their module cannot do, it would save a lot of their customers' time and their own reputation.