Constant blinking turn signal?

My husband and I were on our way home last year, when he jokingly smacked the turn signal a little too hard. Now, it constantly flashes and blinks and won’t turn off. My husband had to pull the fuse out of our fuse box, so that the turn signals were currently off. This is also made it to where we have no heat and no air conditioning as well. I was wondering how we would fix the problem of the turn signal constantly being on?