That was putting pressure on the federal government and the states that are running their own insurance exchanges to fix the problems amid strong demand for the private insurance plans.

“I think I’m through with Hawaii Health Connector,” said Richard Gamberg, 61, of Honolulu, after tweeting messages to officials and complaining to state lawmakers on Wednesday. “They’ve got ads in the newspaper, they’ve got ads on the TV — it just flabbergasts me.”

He was among the would-be customers in Hawaii who were still unable to buy insurance policies online Wednesday, forcing them to turn directly to insurance companies to examine their options.