Fiat Stilo 2004 (squeak when I left the clutch)

Good night to everyone,
a few months ago I had a problem with my stilo and here, in this forum I save money and time.
Now another problem has come out to vary and I will trust all of you because it is clear that the poor cannot disburse euros every time a car is expensive ..
In the last revision, apart from the oil and filter I changed the alternator's strap and the Org.Auxiliary tensioner.
A mechanical friend told me that I was carrying the strap very food and changing it in the official dealership.
The surprise in which when I took the car out of the workshop, when leaving first with the fucking clutch I hear a squeak, like a cascabeo (but not that of the release that all the Fiat do) that comes from the alternator area.
I turned around and I told me and they told me that it was because the belt was new and that ... (the usual) the noise has increased me and I have taken it again and they are giving me long, as if the squeak was not out of some of the alternator ....
I am without being a mechanic I am 95% sure that it has to do with the tensioner or with a bad place of the belt ... I have told me to take it on Friday to see it. money) can you help me ??? At least to go on Friday with something under my sleeve, so that they do not deceive me so easy because in the end they want to hit it, it is what I have the unknown of mechanics.

I would appreciate your help, thank you very much
forgive if I have been heavy. Greetings, David

Look either do much information, but of course you tell me that they sound when you use in clutch, you would have to look in the other part (collar).
But possibly you have a tensioning roller echo sorrow, which means that it touches distribution, care with these of Fiat Eye

Thank you for answering, because you look information I can tell you that I already changed the distribution of the 90,000km, now it has 130000km, this morning I have approached a confidence mechanic and asked him, he told me that he is almost certain that it is something related to the alternator but that the belt is not because it is tensioned ... He told me that he would have to disassemble to check what it is.
I have read something about a roller online that can be in poor condition.
The noise occurs if I try to go out with the car without stepping on the accelerator, that is, with half clutch alone.
If I apartment the brake and at the same time I try

This morning they call me and tell me to take the car on Monday, these people from Fiat are unpresentable.

Look if you want to make sure that screech is related to the alternator is very easy what you have to do the tensioner (bolt) and take out the belt, then turn on the car and you have the same as always when you take it out, if the squeak disappears it has to do with alternator and its tensioners, if the noise persists opens to check the distribution and some other components.
You have this and warn me what happened.