ArrayGen Technologies Sales Associate interview questions

interview was normal .hardly 2-3 questions regarding sales. in interview i was selected they told me you will receive mail regarding the same and your joining will be on 1st of september, i gave my interview just two days before joining date .since then i did not receive any mail i tried to contact then i was told there are some technical issues with company then i asked why did"nt you tell me before .he said you will have to join on 1st of october .i said fine atleast send me offer letter and joining date . no offer letter was provided . a mail was typed and send saying you have been selected and give scan copies of marksheets . i replied just send me offer letter i will provide . a pathetic reply was send stating gimme your documents or else you are disqualified and please dont give any suggestions. company was not supposed to use this language and company is not clear with its motive.