i want to unlock my iphone

Read the first few messages. The ONLY way to unlock the phone is to ask THE CARRIER IT IS LOCKED TO for an unlock. Is Personal Argentina the carrier it is locked to? If it is not then they cannot unlock it.

Yes, its the Carrier. I have started the procedure, but they don't answerme about this. They just said to me that they already started the process with apple. If this is true, what time take this process?

Apple doesn't unlock phones so if they are telling you that they have started the process with Apple then my guess is that they have no idea what they are doing or are giving you the runaround.