The "polls" did not predict the electoral college, they ask people how they are going to vote and how likely the are to vote i.e. the popular vote. Other predictions are a seperate step done afterwards using the polls as input, generally not by polling companies. And at least one such prediction by 538 had it as a 1/3 chance of Trump winning, which considering how narrow the eventual gap was, is a pretty darn accurate prediction.

A couple of other people did say 99%, but they were clearly wrong even before the result came in and were called out by, for example, 538.