Janey, a couple years ago our dog at the time did the same thing to ours. I contacted P.C. and brought it in for what I requested to be the least expensive repair it would take to be functional and decent looking. Not necessarily
'like new'. They said it needed to be replaced. Some where around $ 250 to $ 300, if memory serves. Done. Looks and works better than what was there.
Just my experience, maybe yours will be different. In order to keep it (hopefully) from happening again, we bought one of those expandable 'child gates' for doorways, that we now keep in front of it. Working so far.
jim