ROBACOM

I get 2 GB every month from Vodacom since am on top up, 1GB lasts me till the 23rd of each month at this point my phone sends me a notification as well to tell me I have reached 1GB. Two days later the last 1GB gets depleted, how I don't know. I go on the same sites (Whatsapp, Facebook, Instagram) from first day of the month till the last day every month, this is routine as I have another gadget that I use for downloads and to watch videos on YouTube (which has 2GB as well from Vodacom). I had months where I reported my phone was without network for days and was unable to go on to the internet when I called Vodacom to report this different agents would give me different reasons and my data would be used during this time. when I asked the agents how could my data be used when I do not have network they would give me more unclear reasons. I have reported this issue on numerous occasions and not once did Vodacom pick this up or flag it as a concern, the last time I called I was eventually told the tower in my area was under maintenance as another customer from that area had reported network issues. The billing is not right, this is **************** by ROBACOM. I