Walmart Software Developer interview questions

I interviewed with Walmart e-commerce recently. I was reached out by a recruiter, had 2-phone screens and then an onsite interview. Got a call within a day or 2 after the onsite interview. I got a verbal offer and then we were in negotiation stage for 1-2 days. Shockingly, next day I received an email saying that they have decided to go with another candidate !! Would you believe that ? A company like Walmart backing out after the verbal offer. Really bad experience interviewing with them. Anyone interviewing with Walmart in future - never assume you got in until you have a written offer. The company and the recruiter don't keep their words. No values at all.