Cell C poor service and **********

I have been a loyal customer to Cell C over the years, It's my 3rd phone from them so I'm basicly 6years with, but I must say the service I got from them sins last year is discusting as they now some deduct money out of my account for no reason now they block my sim but they still deducting money twice a month out of my account...I am deeply disappointed in them and when ever I phoned in they can never give answers. Cell C very poor service