I ordered Pokemon rubbers from a seller. Shopee website informed that it would be delivered in a month after order date.
After one month, when I follow up, the seller informed it couldn’t be delivered. She is not sure when it will be delivered.
So I decided to cancel my order.

If the order is already 3 days old, you must get seller’s approval to cancel order. If seller won’t approve, Shopee will do deliberation.
To avoid any issue, I chat with seller to approve my order cancellation because it is too long. Fortunately she agreed to it.

Email Cancellation Confirmation from Shopee


Refund Of Cancelled Order
Order Cancellation

My credit card bank statement

As you can see, I received on same day after approved cancellation. Based on Shopee SOP, it would take them at least 3 working days.
So to cancel order for more than 3 days
1) Have a good reason
2) Get seller’s approval by informing her directly via Shopee Chat.