Cancelling your Aitum app subscription is easy.
Please note: if Stripe is already attempting to take payment for an invoice that has already been issued, cancelling your plan will stop the following billing period.
As you've entered the next period (and are on a few days of grace), the next period would be the following month if you're on a monthly plan and the following year if you're on a yearly plan.
Stripe stops attempting to take payment after a few tries within the week after an invoice is issued.