Poor client care and investigation on accounts/incidents

I’ve been recording my voicemail greetings and enabling it on 121 but still goes to subscriber not available when off, reported at the vodacom client care more than three times to ask for assistance they insist they have fixed this it but still does the same thing, and again upgraded a few months ago i paid before collecting the phone they gave me the installment to pay but they deducted a different larger amount as agreed without informing what it was for also didn’t get an explanation from client care as the agent said it was for upgrading i told her I already paid at the store this was the 1st time happening and im upgrading for the 2nd time now. I am definitely not happy with the service