I bought a font in the Huawei Design app (paid with prepaid card), but I don't like it as I had hoped.
Can I cancel this purchase and get the purchase price refunded?
And if so, how?
Can I cancel this purchase and get the purchase price refunded?
possibly
And if so, how?
Contact the seller and tell them why you would like a return.
With digital goods & downloads, this will be a bit difficult. How are you going to give them back?
see also https://www.markt.de/ratgeber/recht-finanzen-steuern/umtauschrecht/
You bought and paid for it yourself. If you don't like it or you don't use it, the seller doesn't care because he has done his job. You won't get your money back.