cannot open billing information

Good day since i took the contract from Vodacom 3 months ago i am so so dissapointed with Vodacoms way of billing and their whole service to customers. i have a contract with Cell C and thought i would change my daughters contract to Vodacom from advice from other customers. but from the beginning i only received bad service and then i couldnt open my bills sent to me via e-mail. CellC send their bills via e-mail with pdf files which i can open. the billing from Vodacom i cannot open. i went to the Cape Gate office and they said i can only get iformation from Head Office! wht total nonsense! and furthmore when they gave me the bill of last month (end of October) there is also a problem with the bill they also cannot explain the problem to me and said that Head Office have to be contacted. you cannot get any service at all from the office!! i so so regret me taking out a 2 year contract from Vodacom!!