The foundation offers the DoliStore platform to help seller and buyer to meet each others. Only the the service to provide visibility of sold product is offered by the foundation. The foundation does not guarantee anything about the quality of product the customer buy.
If you experience troubles with a module, please go on the module page to see how you can contact the support provided by the author of the module.
Only authors of module can help you. You must always contact them first for any questions and any troubles.
If after contacting the author, your problem is not solved, then, please inform the Dolibarr foundation (email: email@example.com) about your trouble and result of the contact you get or failed to get with the author so we can act as we should (disable the module, refund you if necessary, ...)