Useless Vodacom call center agent and my data depletion within minutes

In the morning of the 4th of August 2018, I had 1,5gig of data of my phone, for some reason my data got depleted without me using my phone at a fast pace so that was about 9:25 to 9:34am. At 11:10am I decided to buy another 1 gig of data bundle but also got finished by 11:21, I just get these smses from vodacom saying my data got is being without me using my phone. I phoned their help desk and I battled to get help and to reimburse my data atleast the gig that i had just bought. I spoke to an agent : Kgotso who told me they had reimburse my data but when I checked, there was no data bundle. On Sunday morning, I phoned the call center again, I spoke to some lady who hung up the phone till now I dont have my data. I call this *****ing and no one was willing to responsibility for this issue. I dont get value for money.