VODACOM FRUSTRATION!!!!!

I am sooo frustrated with the service I have been getting from Vodacom for the past few months! My phone contract ended end of April and I took a month to month airtime/data contract when my initial contract expired and every single month I get my statement with the handset amount included. I have to call them every single month for the same thing and the customer care consultants will me it is noted on the system not to include it and that the service department will call me and they have never..I am beyond frustrate at this point, I am SICK AND TIRED of this unprofessional service where no one can tell me why its there every single month