I'm looking to leave skinny unlimited fibre for another provider. Is my reading of their T&Cs correct in that I can leave anytime (without notice)?

Since payment is monthly in advance, I would like to time my leave date for the day before the start of the new billing cycle. I can't seem to find any mention of when the billing cycle is, I assume it is the day that money is deducted from my credit card.. currently 3rd of the month.

Advice appreciated.