Refinement of acquiring Raiffeisenbank

Site on ocStore 3 (opencart). It is necessary to finalize the payment module of Raiffeisenbank. Now the module works, but not made Callback, does not transmit information to the payment from the bank page to the site. Input data, where is what is provided.

https://e-commerce.raiffeisen.ru/api/doc/ecom.html Documentation