Another so called loves tech in California

This alternator maybe lasted 3 weeks brand knew. The female so called tech in California at the loves installed this alternator knew.brand knew. After installing it tells me to start it up. All I heard was a loud bang and shut the truck off. About 3 weeks later it was obviouse that loud bang was from the so called tech improperly installing the pully to the alternator. It's lasted about 3 wks and started coming apart. Qualified tech my ass !!!