The system is working as excepted. As your image shows, you have "2 threads remaining", used. All you need to do is click the "active" button to activate them. It currently shows "Inactive" red buttons.
I'm sorry, we can't provide a refund for the time. We do not keep track of when threads are active or inactive. Anyone can simply click 'inactive' at any time and request a refund for x days. Sorry.