unprofessional and useless

Earlier this month I bought a data bundle from Vodacom by using my cellphone app. I received a pro-rata data for the month however they doubled charged my account. I only received a pro-rata on one data bundle but was charged for 2. I went to my nearest vodacom shop and they told me to phone *** accounts department. However the staff working at the accounts department is very unprofessional. I spoke to 2 people and not one of them were able to give me an answer as to why they have doubled charged me for the bundle. Infact Mcdonald Ndlovu, the guy who I spoke to just put the phone down on me when I tried to explain to him what I wanted. I am very unhappy with Vodacom. Always get over charged for things and never is there an answer or solution for it because their staff is *********** and unprofessional. When I phoned back and asked to speak to Mcdonald to tell him that I wasn't happy with him putting the phone down while I was still talking, they told me that they can't transfer me to him, probably covering up for him. Useless and ***********! I am very dissapointed and I won't be upgrading my 3 contracts with vodacom again.