There is no blockchain balance. Blockchain is a technology system, not related to economy. Bitcoin is a payment made to promote blockchain technology. You can convert
Bitcoin to cash on exchange through the exchange, you can find a seller from a country you are on
https://localbitcoins.com.
If you can receive EURO I can hel you with OTC but your funds need to be in one of the following cryptocurrencies: Bitcoin, Ethereum, Dash, NEM
SKype: amadeual
Thank you
Blockchain balance means cryptocurrency balance and to cash out your cryptocurrency from blockchain wallet, you will have to transfer it to some cryptocurrency exchange and they will transfer you your required money in your local bank account. This is the method of withdrawal. But always use authentic exchange for your transactions to avoid scams.