Contract breach, Delay in response for complaints

I took a contract with Telkom in Rosebank for a Mobile wifi(pocket wifi) at the end of February 2015. The package included 1 device, 1 sim card with 2.5gig of anytime data and 7.5 gig of night surfer data. Since then I have not been given the 7.5 gigs that was promised as per the contract agreement, which is supposed to automatically be used after 12am. When i called to inquire they admitted that its a fault from Telkom and their technical support will get back to me by Monday. They gave me the case number and the agents name. Its now Tuesday and they haven't gotten back to me and I cannot call technical support myself and they cannot transfer me either. They cannot reimburse me the data that they owe me. I have been inconvenienced for the past 3 months and lost 22.5gigs of data because of their incompetency. Initially the device wasn't working properly, it keot losing connection and wanting me to log in ever time i try and connect. Then i was charged for things i never agreed to subscription to. Now i found out they have breached the contract agreement. I have never had so much difficulty with a service provider before and I WOULDN'T RECOMMEND TELKOM AT ALL TO ANYONE!!!!