[TheSpiceIsLife]

Presumably by giving your money back to you.

That's generally how a refund works.

Did you have something else in mind?

[rahulkapil]

That would mean they are an intermediary in the blockchain.

[TheSpiceIsLife]

They create a new transaction from their probably inexhaustible wallet to your wallet.

I don't know much about Calibra, is it a public blockchain? Can anyone build a client to generate transactions and mine blocks?