My return isn't shown on my CRA account and I can't pay the balance owing. My wife's return isn't showing on her CRA account either. Are our return sent in?

When you filed your return, you should have received a confirmation number from the CRA.  Here's how to find your CRA confirmation number: 

https://turbotax.community.intuit.ca/questions/1518044-how-do-i-find-my-netfile-confirmation-number

Note that if you are looking for confirmation in CRA's My Account, it can take up to 48 hours to show that your return has been filed.