Panasonic Software Engineer interview questions

First, there was a telephonic call, simple background discussion.Then they called me for onsight. Before 1 hour somebody called me from their office and asked me to come half n hour early. I reached to the Panasonic office waited for 30 minutes (I was just waiting and no one attended me) then the interview started. The interview was easy each interview had 2 interviewers. One of the interviewers was joined the same day, so he didn't know anything about the company. My last interviewer never came and they told me to go. Within a week they gave me an offer and which was very low than market standards I asked them for negotiation, very next day they told me they are rescinding the offer.