http://collegeofparamedics.org/pages/AboutACP/ContactUs.aspx
Contact the college, you might have to be EMR registered to write the EMT exam. This used to be the case. But I'm not sure if it still is.
Whatever program you take, make sure it's accredited here:
http://collegeofparamedics.org/pages/Practitioner_Resources/ApprovedEMTPrograms.aspx
And here:
http://www.cma.ca/index.php?ci_id=50602&la_id=1
For what it's worth, I like these guys (
http://www.esacanada.com), but they're not Calgary area.
I assume you mean AHS, right? I think as long as the program's accredited, the way you test and interview is going to be far more important than who issued the certificate that allowed you to write the ACP exam.
However, the quality of education may vary by program.