Prestashop migration from a Joomla site to a Wordpress site

Our website [login to view URL] is being redesigned and moved to a new Wordpress template. (We are taking care of that). The old website features Prestashop as the means through which our customers can book their services with us. We do not sell goods, but services, and so Prestashop has been modified to adjust to our needs. What we use it for : 1. Receiving requests for quotations on our website through the "custom packages" menu. 2. Sending out Quotations (Offers) with the help a Prestashop database, where se store the services and prices. 3. The "shopping cart" of Prestashop has been modified, so that we can use it as a planning device or an itinerary for our services, where our clients can add services into, modify the group size, the order of the services, change the accommodation type etc. 4. We use Prestashop for taking deposit payments, but it tracks of the payments made, remaining balance etc. 5. There is also a feature, which has been set up, so that "those who are not of an IT background" can easily edit the pages of the "product" pages in Prestashop and also the same on our website in Joomla in the HTML. What we would need now : We would need an expert who can integrate the old Prestashop system with its payment gateway and all current features with high expertise in a relatively short period of time. We have our developer working on the new website, and he can brief you on the technical details and he will be the person, who will need to be briefed on your work. I look forward to your answers for further discussion