“Cancel my order”
— three words, and no way back once they are acted on
Order cancel kar do
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What you'll observe
It does not cancel. The request goes to a person with the order's current state attached, because a cancellation acted on after despatch is a truck already moving and stock already committed.
The temptation here is that cancellation is easy to implement and feels like good service. It is the single clearest case where being able to do something is not a reason to.