A plunger is the first tool we use to unclog a toilet. After this, using a closet augur is next. To prevent stoppages, flush only bodily wastes down toilets, along with toilet paper. Excessive toilet paper, flushable wipes, paper towels, Kleenex, feminine products, etc, should never be introduced into the plumbing system.
Repeated stoppage may require replacement of the toilet or drain/venting work of the drainage system.