Tried to Be Loyal to My Bike Shop Guy... Got "Betrayed" Over a Horn

So, I recently bought a second-hand Xpulse and decided to upgrade it into a touring beast. Went to this well-rated shop where the guy seemed super passionate about bikes. He suggested crash guards, fog lights, a top box, etc. I liked his vibe—sincere, patient, and genuinely helpful for a newbie like me. I had the top box fitted and ordered a crash guard. For a custom seat, he sent me to another shop, and it turned out great. Then, I visited another big biking store in the city (pure coincidence, I swear!) and found their fog light price was much cheaper than his. Being the loyal dude I am, I *called him first* to let him know, and he was cool about it, saying they’re associates. Respect, right? While at this new store, I picked up a horn (300 rupees) and some foam grips (80 rupees). Great deal. Life was good. Fast forward to this week. I went back to his shop to get my top box wiring done and casually showed him the horn I bought. Boom. The guy *snapped*. He refused to fit anything except the top box, canceled the crash guard order, refunded my advance, and said, “Don’t come back.” Bro legit dumped me because I bought a ₹300 horn elsewhere. I’m baffled. He said it’s a “trust” thing, that he expects customers to come to him for all bike issues. Like, am I married to this shop now? I called him *out of respect* when I found the fog light cheaper. It’s not like I cheated on him with Amazon or something. I genuinely liked this guy and was planning to buy a jacket, helmet, and more from him. But now, I’m wondering if I messed up by not treating him like my personal biking god. So, did I do anything wrong? Should I have acted differently? Or is this guy just being a drama queen over a horn? P.S. Should I just move on and find a new shop or try apologizing for... being a smart shopper? 😂