Hello,
I would like to offer you my prestashop skills. I can take a look to your issue. It sounds to my like something i was fixin some time ago.
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I work daily with prestashop over 5 years. I know prestashop from top to bottom. I am familiar with every aspect of this eshop system. Prestashop settings, tweaking, modifiing core and theme files, custom module development etc.
You can also check many of my positive reviews here on freelancer.
Thank you for your time.
Best Regards,
Jarda