Turn off payment on the MODx website

Good afternoon! There is a website on CMS MODx (https://vyshki-tura.ru/), to which online payment through robokassa is connected. It is necessary to disable the functionality of online payment and instead send the form filled out by the user (it is already implemented and is filled out immediately before going to the robokassa page) to the email administrators.

Please indicate in the response the cost and terms, at least approximately, for this task