cell c took R70 from my account without consent

on Monday July 27 I purchased a 50mb data bundle from cell c and received a sms to say that the 50mb data bundle was active I then checked my balance only to notice that I had been credited with a 100mb data bundle and R19 removed from my balance ,so i thought maybe I chose the wrong option ,the next night another 50mb data was added and another R10 removed from my account I contacted customer services to check that I hadn't t activated a recurring bundle ,they checked and said, no they could see it was not on a recurring bundle ,And I must have purchased another by accident which is nonsense as the purchase has to be confirmed all along the way ,Yet again the next night another data bundle was added and another R10 removed ,this went on nightly until they completely depleted my account ,I now have 7 ,30 day, 50 mb data bundles active and a balance of approx R1.50.I have not been able to use my phone for 2 weeks as any time there is money loaded on more data bundles appear ,how is this legal ,I have contacted customer services by phone and email and visited the a cell c store and no one can give me an answer so I now have 2 weeks to use up the 350mb,theft ,disgusted