You can find info on submitting a ticket here: https://www.publicmobile.ca/en/on/send-us. As well, did you check your settings to make sure your phone isn't automatically set to 3G speed. Sometimes you have to enable it on your device settings.
I know that it is annoying/challenging to not have a direct customer service. However, you can submit a ticket for service if you can't find your answer elsewhere (https://www.publicmobile.ca/en/on/send-us). When you refer to credits, do you mean the...
You can view Public Mobile coverage map here: https://www.publicmobile.ca/en/on/coverage.You could look at your specific location to view your expected coverage.
