You can do it through the Contact form available in the “Contact us” section located at the bottom footer section of the VentaMart.com main page:
You can also do this by calling the following phone number: +1 412 728 0 888, or by email: Ventamart Support. We will be happy to clarify your doubts, to help you in what you need and to answer your complaints. Our office hours are from 8:00 AM to 8:00 PM.