Bottomless pit on data and airtime

<p>Ever since i upgraded my contract last October, i have had numerous run ins with Mtn. The latest being missing data that i purchase almost daily. I call the call center log a call get a ref number, buy data again use a small portion then boom data gone. Call center log a call buy data same thing. Before all of this i purchase airtime convert it to min and data bundles. Sometimes i would have rand value airtime and find that i deplete the airtime whilst i have data. No one has been able resolve this since last year. A year on its become unbearable over 3 days ivr purchased 900mb but used +- 500mb no one has given an indication as why. The other week i purchased a weekly1gig data bundle i used it for 6 days and had +- 400mb left. Mtn rendered it expired. Mtn smses me to advise on the expiry a day after they stopped it. App says one the sms says the other, call center does the other. I keep a very close eye on my data usage. Mtn can i have another body investigate this issue. Ive spent in access of R4000 over 3month on usage that i havent used.</p>