*******, over charging

2 months ago I loaded data it vanished from my phone without me using it, I called they said they will investigate to date nothing happened.two days ago I loaded 250MB it vanished within two minuets seriously this is not on it's unacceptable. Today I loaded 2GB data which costs R139 it vanished again from my phone all I get is sms's you have 100MB left seriously, I was charging my phone where did all my data go to? I regret leaving Vodacom for Telkom all they do is rip us off they can't even explain what happened to my data. All I want is my data finish and klaar. Bring back my data, all they know is you have updates what updates, stop ripping people off yes your data is cheap but in the long run it's expensive cause I need to buy more, if you read this please reconsider using Telkom mobile you will regret, I'm going to go back to Vodacom so will my family and everyone I know.