There are three possibilities here:
1. The goods have not been shipped yet (you have not received a shipment notification).
Please contact us preferably by phone. We will be happy to check whether the purchase can still be cancelled. If this is no longer possible, please refuse to accept the delivery.
2. The goods are already on the way (you have received a shipment notification by e-mail).
Please refuse acceptance and contact us so that we can refund your purchase amount.
3. The goods have already arrived at you
Then there are the further steps: to return the goods