Vodacom is not helping customers in need!!!

In November 2019 at the end of the month I realised that there was an unusual amount of data used by a security app of samsung overnight - 8.3GB. I went to Vodacom the very next day who explained to me that it was the app. He removed the App. My concern is that the App is something from Samsung that was requested to be upgraded through android. I have setting on my phone that only allows upgrades when I am on WIFI. The latter was not an upgrade, but the program according to the technician ran in the background. Vodacom locked a call to Samsung and promised to come back to me. I called them in December 2019, and they rep**** that they had no answer. I called them last week and seemingly they again could not provide me with any answer. They promised to get back to me on Saturday that has just passed and still no feedback. In the meantime an additional amount of R3,500 has been paid towards my cellphone bill to Vodacom. I am really distressed. I cannot afford this.