I have a bad deep kitchen clog down in my pvc. drain pipe. It hasnt made it to the big line yet because all the other drains are unclogged and working fine. Ive tried an auger ( not a really long one) about 15 ft. and it wont reach it. Ive used drain-o 2 times. And plungered it once. It has moved some but its still clogged what should i do next? I cant afford a plumber. And my lines are unreachable there incased in cement. My house is what they call a burmed house which means except for the roof and the front of the house everything is underground. So please tell me what to do next. A longer auger or a strong chemical and if its a strong chemical what should i use that wont eat up the pvc. pipe. Help