eBay interview questions

eBay sent me a job prospect for a new project, where they were looking for a full stack engineer, with a nice tech stack. They told me I only had to do one exercise and one interview. I did the exercise, which seemed easy for what they were asking, and then DURING the interview they told me they needed something completely different... we're talking from a React Sr. + Node Sr full stack dev, to maintaining a 15+ old html site, with JS pre-ES6, and front-end only. They used a bait and switch strategy, wasted everybody's time, changed the interview time twice and forgot to send the updated invitation. The interview itself was one of the lousiest interviews of my life, asking simple HTML markup questions to somebody who already did the technical exercise, and with 10+ years of web development.