The refunded assets will be transferred to your Mixin Wallet.
Mixin Wallet requires a 6-digit PIN to be verified when transferring funds, and if you forget your PIN, your assets will not be withdrawn.
Mixin Wallet is a decentralized wallet; PINs cannot be recovered if lost.
The EPC is paid to ensure that your Mixin Wallet can be used for regular transfers and to avoid loss of assets.