Is commonraildiesels.com Safe?

Sold me a faulty injector "refurbished" but the electronic part wasn't refurbished just the nozzle if it wasn't just ultrasonic cleaned only. Wrote to the seller about the problem by asking about the options. The next morning I was driving to work and had my barely working spare phone when the seller called me very annoyingly cuz I could not pick up the phone while driving. I pulled over quickly to tell them that I can't talk and will call him after work. He made over 30 calls from two different numbers and... Check out what I found on eBay messages when I back home: Customer 1 - I am voiding your warranty due to your comments - you have no warranty - return the item immediately 2 - I have banned you from any further purchases and notified colleagues NOT to take any sales from you 3 - I have had your incorrect feedback removed 4 - I will NOT refund you for this product you have damaged it This is scarry, the person first in the morning was rude, I could not understand what he is yelling but he is absolutely skilled, the business should be closed and the person seek some help.