How to set up utility bills?

Question

Payment systems

Good day to all.
The essence of the issue is that I was instructed to tie the payment for utility services to the WP website without being tied to a personal account, like a "donate" chtoli, that is, the clients themselves enter the required amount, indicate their personal account and pay.
We have already concluded an acquiring agreement with Sberbank, they sent me the documentation, which I look at and see a fig, as they say. It is necessary through the gateway Sber-and.
For three days I have been trying to dig up information on the Internet, woocommerce and wp-shop did not fit ...
Please help with the question, or indicate in which direction to dig!?
I came across the Leyka plugin, they have a plugin for donating to NGOs...