Robokassa. How to check order status?

Question

ROBOKASSA

Situation:
The store has several orders that are paid through the terminal, in order to find out about the status of the order in the robokassa, you need to send a request for each order to the address https://auth.robokassa.ru/Merchant/WebService/Serv... with its ID , and since there are several orders, it is logical to do this by looping through all the orders.
Problem:
When looping through several orders and requesting the status from the robokassa for each order, the script falls into a stupor (freezes), but everything works for one request.
Question: how to check for multiple orders?