No feedback on repeated service requests logged

I logged a service request on Tuesday which was a repeat on a service request logged in late APRIL this year which deals with somebody at Vodacom that keeps removing my request to have a call limit implemented on one of my lines that I have at Vodacom. <br> <br> To this time, nobody at Vodacom has come back to me but this line keeps going way over the limit set.<br> <br> When I called in on Tuesday, they indicated that they had no record of the original request in April but they did see the call limit was requested but cant explain adequately why line attracted the additional charges which was 10X the usual charge.