Charging Phone when not in country? | Petro Canada Rates and Plans | Consumer forum

I just realized that I'm on vacation outside the country until my phone time expires. I recently also changed my phone number and forgot to register it on the petro can website. Does anyone know how I can still charge my phone before my time runs out...or do I just wait for it to run out and then call in to try and get my minutes back once I'm back in the country.