Connect Internet acquiring from Uralsib on the site with Modx Evolution 1.4.14, PHP 7.3.31

It is necessary to link the Internet acquiring for a regular site on Modx Evo 1.4.14. There are no trading modules installed on the site. For each product (tourist services) a separate page is made. Acquiring from Uralsib.
Link to the site kinu. Access to the site to give everyone in a row, unfortunately, I can not and will not) What is needed - I will show, tell. I ask you to announce the approximate amount and timing of the work.