Method onPaymentNotification()

-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.4.6
-- PHP version -- : 5.4

Hi,
I am create open source plugin's payment for "Robokassa" and I only check payment. In docs I see method class plugin's "onPaymentNotification", but when I turn to the address displayed a common template, without my test data;

Example url: moskvazakaz.ru/index.php?option=com_hika...pl=component&lang=ru
It does not output the test data in the method. Why he does not show?

Example code:
public function onPaymentNotification(&$statuses) {
echo "test";
/*
* etc
*/
}

Hi,
And one more question, so look after payment plugin says it all "ok" and changes: "$ this-> modifyOrder ($ order_id, $ this-> payment_params-> verified_status, $ history, true);"
Translates order in "Confirmed", but in the admin says money only in the "intermediate" (indicated in the screenshot), that is not saying. Why did not he writes "2.0 RUB - Robokassa"?

Sorry, Jerome.
Russian translation have wrong meaning.
I have swich to English and that line is mean "payment fee" but in Russian it is mean "payment"
So I misunderstand this