Send a cancellation for the order per Email, adress is widerruf@cc.o2online.de, then you can order the right mobile phone again. A direct exchange is not possible.

Yes, 

Please send the Widerruf for the iPhone via E-Mail to widerruf@cc.o2online.de , don't forget all your personal data and the Order-Number from the iPhone you would cancel. 

Then you can order the other iPhone.

Good luck,

Hi @Morshedul tum, good to have you in our Community.

Has the cancellation of the iPhone 13 Pro order been successfull? Let us know wether you need any further assistance and of course, if you’re happy with the iPhone 13 Pro Max once it arrives

Thank you @Trackdeluxe and Bollermann for providing the e-mail-address and crucial information about the cancellation

Best wishes,
Rebecca