Data and airtime issue

Every time I load airtime or data I don't get any sort of notification anymore when my data is depleted. They just take my airtime. Fine I had made peace with that but last night I bought 200MB of data and it got depleted within a matter of minutes along with my airtime. This is becoming such an issue for me. I had ported from another service provider because of their network problems but I'd rather port back to them than to stay with Vodacom because pf the ridiculous issues I've encountered with them. Something needs to be done. They cannot claim to be the best if they treat their customers this way.