Get the job done on the online store on OpenCart

We need to finish the online store on OpenCart. At the moment probably 70% is ready, but some comments from an experienced developer are welcome. You need to complete the current tasks (there is a board in Trello), connect the payment system and API integration to deliver the goods.

You need knowledge of OpenCart (version 3.0.3.6), payment system Yandex.Money and Yandex.Kassa. Were going to have to figure out someone elses code.