C Surance bad service always.

C Surance, for two months now I'm being debited money for the phone that was canceled, I called last month they told me it's the last month since the phone was canceled the previous month, the call center staff are so rude, I called again today, I sent them the invoice I was kept on hold for 20 minutes only to be told they can't view my ticket ID, again the call center staff they are rude. It seems like I won't get help at all. Why do this people like frustrating clients though?