Sometimes it's worth waiving the white flag, lest you cause damage.
If it makes you feel any better, a story: a friend of mine called me the other night asking if I had pipe wrenches, because one of his bathroom sinks was clogged. He ended up calling in a plumber after spending a couple nights trying various chemical drain cleaners (incl. Coca-Cola, hahaha) and plunging the hell out of it. Said plumber did clear the clog this morning, but it took him three hours and he broke a drain snake in the process. In retrospect even the pro had a lot of trouble with it, even with the right tools.