2.4GB depleted in less than 24 hours

I recharge with 150 airtime, then bought a 2.4 gb for R99 last night. This morning it was depleted. I phoned call centre 2 times but the lady was so rude and unhelpfull. I changed from vodacom because they took my data and now Telkom Mobile is doing the same. Best of all the call centre cant help you or doesnt want to help you. I am sick and tired of this bad service and that they ***** our data and does not have an answer for it. My number is ********** 920