You should post the website and the address that you send bitcoin to. I had such experience (in depositing altcoins to exchange) and I need to contact them. After contacting they confirmed my deposit.

If the blocks never stop generating in my PC, then I will be very rich now (given that all blocks generated have 25 BTC and the price of bitcoin is still the same as now)

And finally it confirmed after 22.5 days of waiting! Thanks all!

It is now the 22th day that the tx isn't confirmed. How can I import the private key to another service so that I can spend those coins again?

With lots of request, I am posting the tx here.
Blockchain.info: https://blockchain.info/tx/5c571741c708e7a19d318887b597b7aec000b572575bf55ae7b4967139495a10 (Latest version is broadcasted on 21/3)
Blocktrail:
https://www.blocktrail.com/BTC/tx/5c571741c708e7a19d318887b597b7aec000b572575bf55ae7b4967139495a10 (it shows it is on 7/3 and it is 'expired')

The tx is now stuck for 16 days and it is still unconfirmed!

Because I just want to save the money (10000 satoshi in a 0.01 BTC transaction is a quite high percentage) in the fees and I had previously done this with no problem (it confirms within a day). But why this time I can't

In fact I tried to wait it to become removed, but the tx is being re-broadcasted by other nodes to blockchain.info so I can't spend it

I had made a tx with blockchain.info wallet and it don't confirm in 10 days (it is not double spend, paying 1 satoshi fee) and I can't use the coins now. What can I do?