Do not care

I have emailed vodacom customer care several times now complaining about my unused data not being carried over from the previous month. I have sent them snapshots of the vodacom app where I check my data and asked them to explain to me then how it works. if I for instance get a package of 40GB daytime data & 40GB night time data. If I have 10GB daytime data remaining from the previous month carry over then the new month should show 50GB daytime data. Vodacom phoned me when it was in a supermarket. I then asked them to please phone me later that same day. Needless to say a week later I am still waiting for the return call and for that matter my latest reply email to customer care data section.