Pathetic service, rather... lack of service

It is for more than 7 weeks now that I have to battle to get Vodacom to explain to me why their calculation of minutes transferred from the previous month differ from my calculation. If something is to difficult to explain is it perhaps not true that it is impossible to explain. ? If indeed then I have to reassess. Vodacom's response is so pathetic that I can only assume that they have no idea what my request is. They also do not call me. Is their maybe anybody out their who can assist me with the e-mail address of the secretary of the CEO ?