I am not in a good position to tell you what to do now. If Catherine told you to wait then maybe your file is going through a different government agency.
If you still want to email her again, you can try to ask her to confirm if your case has been refereed to a different agency so that you can gain patience in waiting for the result.
Also, tell her any particular reason why you wish to see your case expedited. If I am not mistaken, you had to renew your Work Permit recently, correct? Tell her that fact, too. Ask her to kindly help to communicate with your IO to find out what's happening that holds back a PPR, as many people around your timeline already got their PR.
Again, I do not encourage repeated inquiries to Catherine if your information and inquires remain the same, no emergency nature and that they already addressed your question previously!
Good luck,