Appalling service

I have a Vodacom mobile broadband contract of R149. However, an amount of R748 was debited. Upon investigation i found out that a fradulent upgrade was done online and will be refunded with the amount of R599 into my bank account. After many calls I was then told by accounts department that my account is R14000 but Vodacom has refunded R13700 because it was a fradulent upgrade and I will still not recieve my refund. Upgrades blame accounts and vice versa. Ref ***