Bad service

So disappointed with Vodacom service. I bought 1G of data today around 1pm and a couple of minutes without even using the data it sends me an sms to say my data has been depleted then around 5pm i bought 1G of data again and after a couple of seconds it sends an sms saying 500mb remaining and i haven't even used the data at that point. When i call the customer service centre they cant even help me with anything and cant even explain what the issue is..Pathetic service from Vodacom and its consultants 😡😡😡😡 im even considering changing my service provider.