My toilet bowl overfills when flushed, but does not flush. The water drains slowly but leaves all materials in the bowl. I really don't want to go out and waste money on an auger or other parts for the toilet if it's not going to work. I know that may be impossible but if there is a difinitive answer I would highly appreciate it. AND, I do not have a little jet in the bowl or anything, it's an old toilet.