Forsythe Technology Firewall/Network Engineer interview questions

Interview process was very smooth everything was positive and they told me that they will take 2 rounds of interview still they took 4 rounds. After the final Interview they told me that they will give me a formal offer on that day itself but then they never replied me back. I contacted them couple of times and they told me it is stuck in some paperwork but It almost one and half months now they are very rude and they waste my valuable time. Because of them I didn't appear for 2 important interviews. Very bad Experience.