Crowd Media interview questions

I applied for the position of Sales Intern. HR manager got in touch with me and we scheduled an interview. On the interview day I was waiting for one hour and a half and no one showed up. Tried reaching out to the HR manager by email and cellphone but no result. I received an email 2 hours after the appointed time that "they forgot about me". Scheduled another appointment for the next day. The interview went okay and I was assured to receive a response in a week. Two weeks have passed and I had no response. Contracted the HR for an update and didn't receive any information yet. It has been 3 weeks since the interview already. I guess I didn't get the job but I am highly disappointed with the process. If a company treats its potential employees like that you can imagine how it treats its customers. Highly unprofessional behaviour.