Ontario Graduate Certificate = Post Graduation Diploma?

[Vycanis]

Hello,

Please someone guide me. Is the Ontario Graduate Certificate from Humber College is same as Post Graduation Diploma?

I already hold a Bachelors degree and wanted to go for a Post-graduation diploma, can't go for a Masters atm due to low grades and cost. My previous visa applications were refused twice due to program selection, I chose College Diploma from Humber. Since it's easy to change programs within Humber, I'm choosing Ontario Graduate Certificate as I don't see Post Graduation Diploma in Humber program list. However, someone told me Ontario Graduate Certificate is not equal to Post Graduation certificate.

Kindly guide me.

Thanks