Poor customer service

I have never ever experienced such poor customer service ever. It took Vodacom 2 months to confirm that my acc was **********ly upgraded where I had to follow up everytime as no one phones back. When it was confirmed as ***** I had to phone for the refund and when I received the funds it was the incorrect amount. When I phoned again they said it will take 14 days for the rest of the refund...really???? The month of April my account is debited again with the wrong amount after I was told my acc will not be debited at all as I gave instructions to cancell the account. I will now have to phone again for april debit and I'm still waiting for the other refund!! Vodacom is the worst service provider ever and they have lost a valuable customer!