Put yourself in the hands of an expert. I will provide you with a complete Prestashop 1.6 and 1.7 service. I see no problem with custom modifications of features, modules or templates.
Each fix is differently time and program consuming, so always contact me before you purchase this service. I will set the price on a customized basis. The current price represents my hourly rate.
Directions:
I will need from you:
A detailed description of the problem
FTP details for the eshop
Access details to the database if required for the fix
Cooperation :)