Exchange or convert PSN credit code?

I received a 30 euro PSN code and can't do much with it. Can I convert that into money somehow? In a Paysafecard or other prepaid payment credit or in an Amazon voucher?

Have already scoured forums but without success.
I would appreciate any helpful suggestions or ideas.

No, the PSN credit can't be exchanged for another credit.

But you can sell the code: It would be ideal if you have someone in your circle of acquaintances who has a PlayStation to whom you can simply sell it 1: 1.
If not, then you can definitely get it to someone online (e.g. EBay classifieds or Facebook), even if it should then only be for 25 euro.