ATTENTION!!! No registration is required in any of the payment aggregators that will be mentioned below to make a payment. All payment is done through your personal account by choosing the amount (in $$) and the payment aggregator.
I repeat, no need to register on the payment aggregator's website!
In your personal account, go to the Payments(1) section and click the Top up(2) button.

In the pop-up form, enter the amount(1) and open the list of payment aggregators(2)


Select the payment aggregator through which you want to make the payment (below are the lists of aggregators suitable for any given country).
Pally SBP aggregator is chosen as an example.
If the amount you enter is less than the minimum possible at the selected aggregator, you will see this window.

In this case, you need to increase the amount in box (1).
If the amount is correct, then this window will open

where you need to click the Top Up Balance(1) button.
In the pop-up window you need to

1) read the balance replenishment terms;
2) check the box that you agree with the balance replenishment terms and that the entered data is correct;
3) if you agree with the balance replenishment terms, then click the Top Up button;
4) if you disagree or have entered/selected something incorrect, then click the Cancel button.
If you clicked the Top Up button, the payment form of the selected payment aggregator will open for you. Each aggregator has its own form, you need to fill in the fields of this form, following the aggregator's instructions (if any) and make a payment.
Europe / Russia / Belarus / Ukraine / Kazakhstan / Azerbaijan
Israel, Armenia, Georgia, Uzbekistan, Moldova (and many other countries)