Vanishing airtime

For the past two months I've been experiencing airtime and data problem, when I gave them a call and requested they email me my statement because airtime run out after making one or two calls of which are less than five minutes duration meanwhile data balance is Zero without using it.

The consultant apologized they didn't load my data and as for my airtime he gave a USSD code to cancel an "out of data" airtime usage..I did use the code and it cancelled the use of airtime when out of data.the previous week I had a balance of R61 something,I made a less than five minutes call and airtime was finished.

Hope MRP Mobile will resolve whatever technicalities they're experiencing