Vodacom Back Office Incompetence

I upgraded my account at the beginning of this year. First the sales agent allocated the incorrect contract not the one I requested. Finally, the contract type was corrected but then the real nightmare began. A second equipment charge was added to the account which incorrectly inflated my bill. This extra charge was refunded but then the two equipment charges were billed to me for the full amount payable on the device, something the back office appears incapable of correcting. Now, nearly five months later, my account has soft locked me out 3 days in a row which I must then call the accounts department to have it unlocked. I keep suffering the incompetence of the Vodacom back office while not being able to use a service that is fully paid up for.