@Hoop_LaEverything stays the same so no need to cancel the direct debit.
I would though check after your first new direct debit payment is made, if any others have been setup, as i have in the past ended up with 4 direct debits, and on others its remained the same 2.
- Xperia 1V - o2 and Spusu
- Pixel 8 Pro - o2 and Vodafone UK