Moving from Vodafone to 2 degrees, what’s the process

I have decided to move from Vodafone to 2degrees. I completed the form on line and provided my current internet provider details.

It's not clear what the next steps are. Do I cancel Vodafone first? Or wait for 2degrees to activate my connection?

I thought 2degrees might cancel the Vodafone connection since they ask for the customer number but that's not the case.

Any guidance will be much appreciated