Bad attitude and passing the buck

My vox telecom-mtn notice period expires 28 Feb 2018. I signed up for a new sim( ********** 664) only R89(8gig) contract on 30 Jan 2018 using the same sim card as per vox-mtn. The problem is that I can’t monitor my data usage on my tablet. *141# message I keep on getting is “connection problem or invalid MMI code” I pointed this out to the manager, who was very rude, arrogant, no respect for mtn’s client, does not listen to the problem and very obnoxious, who informs me the tablet is the problem(passing the buck). He told me I can monitor the data with an mtn app, but when the app was downloaded it is only for cell phone numbers. Eventually he checked the sim with a cellphone and admitted the vox-mtn sim was blocked. He also stated that sim will be unblocked at the end of Feb. and I will lose no data. He also stated the fol- lowing: that I will receive 8gig pm, although my contract reads 4gig pm; I will be notified when I’ve used my 8gigs. This is very frustrating because I can’t monitor my data. Kindly confirm that the above information is correct. Sorry but I can’t trust or believe the manager.