@Kneeslider: i was able to find the plastic thingy that goes on top of the key( i had to order it from an ebay seller from taiwan), if that works for opening the shutter its fine.
Now i will be looking for a key to fit in the keyholder.
I f i just want the key and not the plastic bit, what should i do: bring the original key toi a locksmit so that he can make a copy? also does the key have specific code or a its a generic type of key?
the ebay ad was this one:
[Spoiler]https://www.ebay.com/itm/-/132237865341?[/Spoiler]