What to do If you are not getting response from original poster of a paid module:
1. Scroll to the original post where module is described.
2. Click the 'report' link
3. In the report please state that developer is non-responsive.
The PrestaShop Community managers and moderators will review the module listing for proper support/responsiveness from the developer.
If found that the module is not being supported properly on the forum then it will be actioned appropriately.
TIP: If you find a module in paid or free section, always review for positive responses from community members and timely response from developer. If you do not see either of these situations then you should avoid using.