My cobbler in London did a very good job, they patched up the hole on the sole with an extra layer of silicon/rubber material and they put a new sole on top of it. They confirmed what I already suspected - these shoes come apart sooner than others, because of the way they are constructed. If you check the sole, you see that a white 'ribbon/tape' goes around the side of the sole, and this is made of a very soft material and wears down fast with walking. The cobbler put a new sole on it but they put it on top of this ribbon/tape, basically this white "ribbon/tape" is now not in contact with the street.
sorry, i know i didn't explain it well and didn't use proper names for the parts of the shoes