As a consumer (for private purposes), you can revoke your order within two  weeks without giving reasons in writing or by returning the goods. The period begins after completion of the ordering process with this instruction. To comply with the revocation period, it is sufficient to send the revocation or the item in good time. The revocation and the return of the goods are to be addressed to:
DOCPA - Dr. Paplewski
Am Volkesberg 17
In the event of an effective revocation, the services received by both parties must be returned and any benefits derived (e.g. a usage fee for the use of the item) must be surrendered. If you are unable to return the performance received in whole or in part or only in a deteriorated condition, you may be required to compensate us for the loss in value. This does not apply to the surrender of goods if the deterioration of the goods is exclusively due to their inspection - as would have been possible for you in a shop, for example. You can avoid the obligation to pay compensation by not using the goods as if they were your own property and by refraining from doing anything that could impair their value. Items that can be sent by parcel post are to be returned. You have to bear the costs of the return shipment if the delivered goods correspond to the ordered goods and if the price of the goods to be returned does not exceed an amount of 40 Euros. You must meet any obligations to refund payments within 30 days of sending your notice of cancellation.