Can I receive my eSim through my email?

I just signed a mobile roaming contract and chose the eSim option. However, after completing the purchase I discovered that even the eSim was sent by mail, not by email.

I would like to know if there is any way to change this and receive my activation QR Code in my email, as I am moving to Germany next week and I need internet to get to my hotel and then to my final destination (that that the eSim will be sent).

If this is not possible, I would like to know how I should go about canceling my purchase, as I only subscribed because I thought I would receive my eSim in my email and have internet immediately.
Edit o2_Bianca: Moved from o2 Mobilfunk Vertrag&Tarife to English o2 Community mobile