Pull toilet and use a retriever on cable. Never ,ever, use drano. It eats at our cables. We know You used it, our cables come back Hot. Some drain co's never tell the Cust. They left a broken cable in line. They just take aYour $$ and scram. Could be same folks that serviced Your line ! They will probably run a camera head just behind retriever , to hook on to it..You are better off with a small one Guy drain Co.