WHY DOES MY DATA EXPIRE-I PAY FULL PRICE

I ASKED A SIMPLE QUESTION WHEN I CALLED MTN TODAY <br> EVERY TIME I LOAD A DATA 1GB BUNDLE, WHICH I CANNOT FINISH IN A MONTH IT EXPIRES EXACTLY A MONTH FROM DATE OF PURCHASE<br> WHAT NONSENSE<br> I PAID R169 FOR THEM JUST TO DATE IT AND TAKE BACK WHAT I HAVEN'T USED<br> WHO ARE YO U TO TELL ME HOW MUCH I CAN USE AT A TIME<br> LAST MONTH I CALLED REF NO ***<br> THIS MONTH I WAS TOLD THEY WOULD LIKE TO SPEAK TO MY MOTHER----NOT ON!<br> I WANT YOU TO RE-IMBURSE ME FOR ALL THE DATA YOU HAVE ******