vodcom still failed what they promised

After all my phones calls since the beginning of my contract i had problems with you guys i phone in last month and the guy said he corrected my packaged and that my monthly installment is going to be R599 which i app**** for in the first place they said because it was an open contract in the first place so now this is the 3rd statement i get that is over R1000 for calls that was logged but they said they closed the open contract so how on earth are you still charging me for calls if i cant even make calls any more ? he said it will be fixed from the first of July ? and i do not even make calls because but if i see the calls amount is over R300 ... i want this sorted , or i will take this further and i have my proof that i was in contact since the starting of this **** contract and they promised it is fixed i am not going to pay these amount i'm sorry the guy i spoked to promised that this is fixed my installment is going to be R600 now still i do not know where the calls comes from because i cant even make calls?? so how can you still charge me this if they stopped the open contract over a month ago ?????????? i want this sorted immediately ... i'm tired of phoning in and get transferred from one account to another..