Hello there, I’m renting a room in an old apartment in Spain and my toilet is giving me grief. Every time you flush, even if there’s nothing in it, the toilet clogs and runs for about 5 minutes. I’ve tried plunging it and nothing works, and I don’t even speak the language here, nor do I have the money to call a plumber. Here’s a photo of the tank, is there anything out of place in the tank itself? Any suggestions for how I can fix this?