Regus General Assistant interview questions

My interview was cancelled whilst I was driving to the interview and has been rescheduled for next week! Not impressed for the reason given. Have also been reading up about this company and they don't sound very ethical. I applied for a full time job with this company as it was advertised to be told it was now a part time job so I declined. Then I get a call saying now have a full time job available and the interview didn't happen!