Sequans Communications LTE Algorithm Senior Engineer interview questions

I applied in May. I was interviewed 3 times (HR, Technical manager, and the team members). The last one was in 30th June. 3 weeks after that, I received an email from HR that you will be notified in mid-August. I never received any email since then. I am really cross, specially when HR does not reply my emails anymore. Such a embarrassing company and hiring procedure!