Expedia Group interview questions

Interview process, was lengthy, but not difficult. Hiring manager, Senior Leader and Cross functional. Focused on business acumen, data, industry trends and experience. However the company told me they were making me an offer. They began negotiations and agreed to relocation, upper portion of salary band and a sign on bonus. I asked them to please send me the offer in writing which they refused. They called me back and said they were not offering any of the sweetners, just the base salary. I again asked if they would send the offer so I could review. They never sent the offer. I followed up and they sent me a generic boiler plate email rejection denying having ever made the offer and saying they went with another candidate. At no point did I ever say no, nor was I ever given a timeline to accept. I asked for a few days to think about the offer which I was told was fine. Abhorrent way to do business.