Tesco Graduate Technology interview questions

So there is some brief online tests after the application as with most graduate jobs, and then after you'll be invited to a video interview. I waited quiet a while, and eventually got a email saying i had passed the video interview, and that someone would be in contact to book a assessment day! Fortunately, this was not the case. I re-checked my account after two weeks of not hearing anything since been told i was successful, only to see my application was un-successful. I contacted them through the graduate/apprentice email provided, and i was told that my video interview was not successful after another review, yet already receiving a email two weeks prior saying my video interview was successful, and someone would be in contact regarding a assessment day. Their support was very un-professional to say the least for a large company, they spelt my name wrong at first, and could not even spell "the" correctly in the emails. I replied and have not received anything back. I looked online and many others get the same treatment, overall, i wouldn't recommend.