Appaling service

I currently have a contract with MTN, and yester called numerous times to try and get a second contract with them, after numerous attempts of getting hold of them, with no luck after being kept on hold for more than 15 mins per time, I spoke to some lady whom I spoke to for over 45 min's only to be told that the system is slow and requested to call me back to advise on the next step after taking down all my details. I am still to this moment waiting for her to return my call. not sure what to think of the customer service being delivered by MTN, if there is any. they are very diligent in deducting the money, but cannot give customer service. with their high tariffs one seems to never have any airtime nor data, no matter how much you buy it never last's.