Hello,
Here I would like to confirm you that I have extensive expertise in Open cart Store Designing and Development, Extension Development, 3rd Party Gateway/App/Plugin/Script Integration, PSD to Open cart Conversion and Theme Development. And will surely help to migrate your current ZEN Cart website into Open cart according to your requirements.
<< Pleas share the URL of your old Platform, So I can check and make fully functional with migration into Open cart.
Looking forward to hear from you soon.
Regards,
Kaushal