Data bundles disappearing.

My name is Nokuthula Lupuwana. I have been a customer of Mtn for decades. Recently I had terrible experience, where I would load data bundles, then within seconds data bundles gone. Today (13-03-2018) I bought 20 data bundles at 1:30 at Pickn pay express. Received sms notification that my bundles are active, I even received two watsap messages, with in seconds I received message my data bundles depleted. To my shock check the balance, 00 data. I phoned, the agent that assisted me couldn't help me instead, she told me I bought night express bundles, which is a lie. I asked her if it was night express bundle, how come my data was active, she told me that I was last on line, yesterday, which was another lie again. I phoned again, spoke to another consultant, Zwelethemba who told me systems are down, took my numbers promised to phone me back at 3. I didnt receive any call, until I phoned again. Another consultant told me system is down. I WANT MY DATA BUNDLES, HAVE BEEN QUITE FOR SO LONG, BUT THIS ******* IS CONTINUING. MTN PLEASE RETURN MY BUNDLES