Hello!

Applicants with English competence other than IELTS have been accepted. If the university or college accepts you, there will be no difficulty.

However, only IELTS is allowed for the SDS stream. Other English competence might be acceptable for the general stream.

We recommend that you also email and ask the Canadian High Commission so that they can assist you in resolving the issue.

Or if you believe in the quote, "Precaution is better than cure" you can attempt IELTS, and go further with it for admission.

As far as GRE is concerned, in some cases it is required, in some it isn't, again depending upon the university.

All the best for your studies!