Bigtincan Application Support Engineer interview questions

A joke. I applied for the Application Support Engineer remote from UK, and I was approached by a representative whom I assume is the hiring manager who had no title on whether is HR, or who, but proposed for VIDEO call in caps, as he´s located in US. I have proposed my dates and times on when I can do a VIDEO interview, including the day I cannot do the interview, which was on the same day I saw the email and replied, so example, Monday I replied proposing from tomorrow onwards I am free. I get an invite for the interview for the same day I cannot do the interview expecting to do this within few hour(s), very short notice. This I informed the hiring person I cannot and listed this in my first email, and to whether if sent by mistake to propose and alternative date. I simply received no feedback, nor nothing, to whether this is possible, or if still currently accepting to continue. First impression of the company you applied. Furthermore, this tells you on the recruitment or hiring person how attentive to details they strive, as they simply missed simple things with dates & times. Would not recommend them to anyone under current staff.