THG Customer Service Advisor interview questions

The HR is really unprofessional and unorganised. I applied in September, and hear from them in November, ridiculous. We agreed to have a phone call at 2:30, but she didn't call me on time. I then wrote an email to her, 30 mins later she replied that she had to go out , and she wants to call me now. I agreed to have a call now, even though she is 40 minutes late than the time we agreed. The interview lasts for only 3 minutes, because I'm holding T4 student visa, and they don't provide any visa sponsorship , so didn't continue. If visa really matters, she could've asked my visa status via email before we arranged an interview. I spent lots of time preparing the interview!