Data & Airtime just disappearing! Absurd!!!!

<p>Good day<br />I would like for someone to contact me with regards airtime. On the 24th I loaded R200 half an hour later when i wanted to buy a gig data for R149 i was told insufficient funds i checked my balanace and it was R144 I could only purchase 500MB which was R99 later that night I needed to send an sms and once again insufficient funds and when I checked all my airtime was gone. Prior to this on the 18th I had 800MB data and the following day all my data was gone. Yesterday the 27th I loaded R275 I purchased a gig data R149 this morning however the remaining airtime was gone. What is going on how can my data and airtime just vanish this is absurd. please get someone to contact me as soon as possible to resolve this matter. Riana ********** 467</p>