Ok, so your DSL stats look good, but I would change the following, one at a time to see if the change works ..
Not Sure but in your country, do you need a VLAN ID, (Italy) ?
Under DSL Settings, change Stability Adjustment (ADSL) to Disabled, as your connection is VDSL
Then try G.vector (G.993.5) Disabled
You are receiving a few FEC’s maybe worth trying a new DSL cable or splitter if you are using one
Try these options and see if any help 
In a completely sane world, madness is the only freedom (J.G.Ballard).
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