Refinance does not mean Renewal
Renewing your mortgage and refinancing it are two different things.
Renewing your mortgage is when the term period of your mortgage contract comes up and you have the choice to remain with that lender or shop the mortgage market to ensure you are getting the best rate. I always recommend a second opinion on your mortgage at this time
On the other hand, refinancing means breaking your current terms and conditions to create a new mortgage with new terms and conditions, either with your current lender or a different one.
Refinance can be done at any point during your mortgage term or renewal time, but fees and penalties may apply.