Hi guys, there's a problem that I've been encountered for a long time.
I can't buy a game on Steam mobile. I'd tried to use many payment methods, but nothing could work. When I pressed "continue to Smart2pay", it took me to my browser (Google Chrome) and loading for a second. Then nothing came up, everything was quiet.

Is there anyone having the same problem as me? I really need help. I don't want to open my laptop just to buy one game.