ANSR interview questions

The company had reached out to me saying they have openings for their client Albertsons and I was interested in opportunity. I cleared screening round and had in person technical interview at Albertsons. The interview difficulty was easy to moderate level, Asked me to write pseudo code of a spring boot API to get User details with Id and Get user details from Frontend as well. I had written and showed, also asked few technical questions which I answered expect one. After the interview there was no call back from company, after few days I called HR few times and I didn't get proper response from them and One day I got regret mail without mentioning feedback. One important note is I even got regret mail before attending technical interview as well. When I showed them regret mail before interview, the said it's sent by mistake. This hiring process is really crap and pathetic. No proper management of hiring and ghosting candidates after interview.

It was an interview for a client which is started it's GCC in india, It was single round interview with Client , expectations were clear and asked questions on Pyspark