I say campy all the time. People know what you're talking about, so the basic premise of communication is there. What's the big deal?
The big deal is it's wrong and it borders on being an offensive term. Aside from the obvious slur in using the term, there is no "y" in Campagnolo, and no-one except internet-dependent juveniles use it.
Since Campagnolo is an Italian company, there might be some humour in stating that you had several "Campi" items. (The plural of Campagnolo could possibly be "Campagnoli"), but even so, there is no "y" there.
Perhaps we could arbitrarily change your name to Rhis? People would still know who we were talking about, so no big deal then? ... Get it now? ... If people continued to call you Rhis when you knew that they were aware how to spell your name correctly, that would go beyond the boundaries of ignorance and could only be described as rudeness.
It's exactly what I would expect from a dumb Yank, but we can do better.