Well, you're going to need to renew BOTH you medical and IR before you're hired by any company. I'm actually surprised you were able to get an interview without those being current. Frankly, I wouldn't even give a resume a second pass-over if I saw that. That's probably the biggest reason you've not heard back.
So, once you get your medical and IR up-to-date, you'll be in a better place to expect a phone call. You're going to be the underdog, so you're going to have to highlight your non-flying experience and how it relates to the cockpit. At 50, you'll have enough transferable and life skills to draw on. I've worked for companies who hired 50-year old ex-cops over 23-year old new pilots a number of times - all because of life experience.
The Calgary area has a couple operators (North Cariboo, Sunwest, Integra, etc.) that are willing to take pilots who are older and looking for a second career (or looking to get back into it). I would expect you to be hired on as a First Officer or co-Captain for a while before releasing you to the left seat again.
Finally, as evansb mentioned, read the sticky. A lot of really good information in there.
Hopefully some of this helps! Good luck.