MOSCOW, April 4 : Telegram founder Pavel Durov said on Saturday Russia's attempt to block Virtual Private Networks triggered a problem with a domestic payment system, adding that tens of millions of Russians were now resisting the digital controls. The issue sowed chaos on Friday for some ​shoppers, forcing the Moscow metro to allow entry without payment through its turnstiles, while a regional ​zoo had to ask visitors to ​use cash. "Their blocking attempts just triggered a massive banking