O2 mobile contract cancellation and internet contract

Hello,

I plan to cancel my O2 mobile contract and move to a Prepaid SIM card.

I have a home internet contract as well registered with the same email with O2 and am worried that when i cancel my mobile  contract, i would lose my internet connection since they might be bundled.

I wanted to also ask about when can i transfer my o2 number to the prepaid simcard

Thank you.