BT Group Digital Data Insight Analyst interview questions

I will never apply again as that person works for BT. The Head of Digital Analysis & Reporting re-schedule the hour of the interview for one hour later, even though I came in London only for it! And he was late 10minutes, he was playing with his mobile, he didn't even though read my CV and he told me that I have an attitude when I am speaking! I am still speechless and I am thing to sue that person.