Yes, the cancellation can be done by making a few repayments.
If you cancel a transaction after making a few/whole repayment, and the merchant confirms that the cancellation has been done, slice will not charge interest for the remaining months in that order. A new order will be created for you, without the cancelled transaction. You will also get a refund of the cancelled transaction amount as a credit balance. But interest already paid by you can’t be reverted.
Please note that slice doesn’t know when a customer cancels their order with the merchant, we wait for the cancellation confirmation from the merchant. Usually, merchants send confirmation within 7 days, but it varies for different merchants. slice will refund the canceled transaction within 2 working days after receiving the confirmation.