Octopus Energy Operations interview questions

I applied online and received a 1st stage 1:1 interview. It was roughly half an hour and typical customer service questions. The interviewer was nice enough and I was told I would be contacted in the next week about whether I got the job or feedback for what I could do to improve. I was never contanced. I waited a couple of weeks because I thought it could have something to do with the rapid growth of the company. Eventually, I accepted I probably didn't get the job, but I was still curious about the feedback, which I thought could help me moving forward. Again, I received no reply. I can handle rejection and criticism, but there is nothing more infuriating than being left on read by a potential employer, especially when you're told you will receive a call regardless of whether you do get the job. It's a shame because I did hours of research into this company and what they're doing genuinely seems interesting and innovative. I hope I am the only one who had/has this experience.