Cell C is a **** service provider

Its been a year now that I have been in this battle with Cell C. They still continue to debit me every month even though my contract ended in January 2019, I have called the call center so many times and they finance dept always tell stupid stories, I'm asking them why they cant make the debit order end and I never get joy! I'm sick and tired of this rolla coaster ride with them, They are a ******* and they should no longer be in service!