you say you did express entry profile and received a letter that your application is cancelled, I assume you filed an EE application and that’s rejected being incomplete. If that’s the case, you’ll get your fee refunded in your Acc.
You need to create a new EE profile, get an ITA and apply again.
For Canadian edu you need to submit transcripts, degree, completion/graduation letter. I’d suggest you go through your whole application and docs thoroughly as it’s not necessary that there’s only one mistake. There maybe other errors that will need rectified