I have a bad clog in bathtub. I asked earlier but now I have details.?

I have a bathtub that wont drain. Its on the first floor slab foundation. I have plundered, snaked and poured sulfuric acid down the drain. After a shower it takes about 5 hours to drain and its getting worse. Water pools immediately. The house was built in 1952. I snaked down the drain, it would only go about a 8 inches. We feel I got much worse after the sulfuric acid. The plumbing is all metal. I really don't want to call a plumber because we are broke right now. It cost $60 for them to come out. Please help!