SMS's sent with incorrect info

Since the beginning of March 2016 I have been receiving up to 5 SMS's within 2 minutes from Vodacom that my balance owing is R0.00. Then I get more SMS;s saying my balance is R1.74. Both these amounts are incorrect. On numerous occasions I get told by Vodacom that they have corrected this and then the next day I receive these messages again- sometimes at 1.00 a.m. in the morning . I have sent numerous e mails to them in this matter and then get a \lie\" back from them that this has been rectified. Does anybody at Vodacom know what's going on or do they just not care because I am a small client and perhaps hoping I will go away?"