Vodacom is *******

So I cancel a number on my account January 2019. Done a stop order but my money still gets deducted. In total Vodacom has taken R 1,350 and today taken R 320.88 from my account *******ly. WHAT MUST I DO TO STOP VODACOM *****ING??????? Their customer care line is always overcrowded, experiencing high call volumes and please use *135# for options.