clogged toilet

Our upstairs toilet has been clogged for two days. I’ve been using a ball-type plunger, draino, and gallons of hot water but it still won’t flush completely. The water goes down but it doesn’t "flush" if you know what I mean. What else can I do besides call a plumber?
since the water is still making it down, plunge it when there is water in the bowl, keep plunging and keep flushing. eventually the blockage will clear because it istn a total block. any ideas as to what is stuck?