Help!! toilet clogged with washcloth...?

I'm an idiot and a washcloth fell into the toilet as it was flushing and now it's clogged. I stupidly tried flushing it a few times and it overflowed. It's a cheap toilet so it doesn't have much flushing force. I ran to the store and bought a plunger, but after plunging it repeatedly it still won't give. I'm renting, so please tell me what I can do before calling my landlords.