reading between the lines, I gather that these wheels were OE on your Bianchi. If so, your next (and should have been the first) step would be to speak to the Bianchi dealer you bought from, or to another Bianchi dealer if you moved.
Companies change specs who they deal with all the time, so if your bike isn't very new, there's a good chance that a matching replacement isn't available. Then it's a fix or replace issue, and you may have to buy a non matching replacement wheel.
BTW- replacing a hub within a wheel is more expensive than replacing the entire wheel, so if the hub isn't repairable, than a new wheel is the only practical recourse.
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