Internet acquiring to the site Sberbank ModuleCass WordPress your own theme

Hello, you need to connect Internet acquiring on the site on a self-written WordPress theme, with one single form for payment. Through it, the client makes payment. In parallel, there is integration with CPM My Class.

Internet acquiring from Sberbank
Cashier Modulkassa
Yandex OFD

The client must be able to pay both through the form on the website and through 2 accounts of CPM My Class, after payment to receive a check by mail. The cash desk should work correctly and send data to the tax office, 54 Federal Law should be observed all the way.
Adding code to existing files should be commented, the code should be visually organized, after work to show where in the structure of the site was created and changed. Avoid additional services for integrating payments with the site. Comply with the canons of WordPress and site optimization, in particular, connect the necessary styles and scripts according to the rules of wordpass only on the necessary payment pages, and do not load the rest of the pages with unnecessary code. In CPM My Class ready integration through the interface, you need to make sure that everything together will work correctly. In the personal account of Sber, additional information about the payment is transmitted, which allows you to identify the client (screenshots are attached).
The price can be negotiated.