Refurbishement of my Zegna Napoli Couture shoes

Probably your best bet is, to contact your local Zegna store and see what they suggest. They might return the shoes to Italy; they might send them to a local cobbler. I don't know your shoes, but if they are hand stitched Norwegian construction, no local cobbler will be able to cope with them (probably the only thing they can do, sand down the old sole and glue a new one on). You can always take a photograph of the shoes and/or the production markings and contact Sutor Mantellassi, asking whether they made the shoes and what they suggest to have them refurbished. (Maybe you can send them to their American agent.) Maybe there is a excellent cobbler within your locality who is up to do a good job. In general it is always preferable to return the shoes to the original manufacturer. They will use the original last and use the same standards and components they have used on the new shoes. Sometimes this might not be practical or too expensive (postage to some other part of the world).

I have to disagree here, i am sorry Bengal- stripe. In 'Norvegese' constuction, the chain stitch has nothing to do with the outsole; connects thru a feather underneath the insole. Outsole to midsole is typical. A good local cobbler can keep these types of shoes going just fine, assuming you can find a good local cobbler.