Incorrect allocation of data

I spoke to Thabelo from the call centre to increase my data bundle from 500mb to 1GB on 01/08/2015 I only received 500mb of data. I called in to the call centre and they advised that there is a problem with Vodacom allocating data it will be corrected in a day or two. I received my statement on 05/08/2015 advising that I am billed for 1 GB, however I did not receive all my data. I called in on 11/08/2015 to follow up on this matter and a Lungi said that 1GB was allocated to me on 02/08/2015, I said this is wrong and I asked to speak to a team leader, she transferred to a agent called Zama, who confirmed that I only received 500mg and that he will create a credit for 500mg will be allocated to be within an hour. He gave me the following reference numbers: 802481 and 802483. I called six hours later and this problem was not corrected and I was advised to wait 24 hours. I called in to the call centre on 12/08/2014 and spoke to a Fani, who said that he will speak to a manager and they will make a decision and I should give him 24 hours then will get back to me....24 hours has passed and this problem is not resolved and nobody got back to me. WHO IS GOING TO HELP WITH THIS MATTER???