I dont trust Vodacom

About a year ago i complained on here and vodacom to this day have not explained to me what happened they just gave me a credit on my account, They responded but not satisfactory they said that the last time they gave me a goodwill credit after I complained?????? Really! To this day they have not explained to me what happened. And this time they cant tell me how the account is so high because they dont keep record of what the usage is. Like always ill pay my account but i am highly and utterly dissapointed in Vodacom. I feel **** to as a customer because they cannot explain they just charge your account. I asked them specifically not to call me on more than one occasion and that they should communicate via email because their call centre agents only frustrates me because they dont hear what Im trying to say as a customer they didnt honour this. Their explanation doesnt make sense and they want me to to believe something that is unbelievable. Terrible