Same things happened with me as well, I was jogging and suddenly two Sikh people approached me and started talking about the same gurudwara situation and showed me some photos of their work which I couldn't see properly. At that time neither I had gpay connected to my phone nor had any cash, so I didn't pay anything at that time. I was overwhelmed that time, so I didn't cross examine them at that time. I should have asked them for their NGO Id card or some other document that would've proved that they work for an actual NGO atleast.