The customer paid his money, and he got no controller, just bullshit excuses and evasion and abuse. That gives him the right to complain. And he certainly started with a reasonable tone.
It doesn't help that Christoforo is selling the controllers off his ebay account, which says they are shipping from Massachusetts, while his 'company' claims to be in California.
1. Customer makes a $50 purchase.
2. Merchant gets over his head with new business, makes some mistakes.
3. Customer flips out on second email to merchant, tries to create problems for him with Visa.
4. Customer proceeds into a "principle" (aka ego) driven exchange with merchant that goes nowhere, turns into some kind of a pissing contest.