Hathway — I am complaining about rude customer service

I majorly stopped using Hathway due to large number o[censored]nnecessary call from Hathway. Today received a call from them again and the lady was very rude and asked me to cut the call and get lost. Seriously where is the basic customer service here. I have taken up multiple times to surrender my device, but no response. Please stop harassing customers.