Send a cancellation request:
For buyers – how to request an order cancellation
Have you paid?
If the seller refuses to cancel or doesn't respond, then you will have to wait and open an 'item not received' case.
You should be able to do this after 7 days even though it's a collection only item.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)
