No call back

I did an online application for a telkom mifi 5gig at R99 March deal on the 4/03/2016. I tried to follow-up on the application with the call center and was on hold for more than an hour. I then received a call yesterday from a call center agent confirming my application and then I was put on hold yet again only to be told that her system is giving her an issue and she would call me back in 20mins. I have not received a call as yet and can not believe the service that I am receiving from Telkom. This type of service is really disappointing.