How to pay for the service by invoice through the site?

Question

PHP

Hello!
This is the first time I've encountered such a problem, do not judge strictly. Implementation question.
The user (individual) registers on the site by entering personal data -> selects a service -> clicks pay -> the system generates an invoice based on the filled in data -> the user stomps to Sberbank, pays the bill.
And, there was a separate wish that the user could see a certain "payment status" on the site.

Answer 1

Why status? Until he returns with legs from Sberbank, it will most likely be paid there.
Why do we need such payment methods nowadays? Why not (as an alternative at least) make a direct payment on the site?
To give status - it is enough to know whether the money has arrived or not.
How will you know this?
When the accountant checks and ticks "paid" for example.

Answer 2

Yandex.Money won't solve your problem? Pay directly on your site. Why accounts and trips to Sberbank? 21st century in the yard!