Hello,
My name is Sergey. I am Freelancer from [login to view URL], Russia.
I can help you as Prestashop programmer to fix issue with double payment error and fix checkout process.
So, user will receive a Confirmation email after successful payment.
This is list of Prestashop projects, successfully completed by me via Freelancer(dot)com
1.
"Prestashop 1.6 Expert Needed to Add Default Product Attribute to Category Page"
https://www.freelancer.com/projects/php/Prestashop-Expert-Needed-Add-Default/
2.
"Reverse the mess last freelance did and easy fix on email price display"
https://www.freelancer.com/projects/php/Reverse-the-mess-last-freelance/
3.
"Prestashop, validation of combinations no works."
https://www.freelancer.com/projects/Prestashop/Prestashop-validation-combinations-works/
4.
"Prestashop Issue. Combination Products showing $0.00 on Catalogue Page"
https://www.freelancer.com/projects/Prestashop/Prestashop-Issue-Combination-Products/
5.
"Prestashop bug"
https://www.freelancer.com/projects/php/Prestashop-bug/
I need FTP access to start right now.
I can communicate via Freelancer.com.
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Sergey aka Takereal