Worst customer service ever!

On the 16th April I went to Telkom mobile to upgrade my current data account from Smart Broadband wireless 10Gb to Smart Broadband wireless 20Gb. They were unable to do this for some unknown reason and opened a case on #***6. The nest day I received an SMS stating the case was resolved. This was not true. I called 180 and was told that a supervisor would follow up and call me back the same day. No call received. I called again and the same story. I then sent a complaint email from the Telkom website and received a reply that I needed to answer 3 security questions so that they could assist me. I did so immediately and still received no further response. I rep**** again to the email and again no further response. I called 180 again and was told that the case was closed and I could now go into the store and apply for the upgrade. This is just unbelievable. I would like Telkom to just do the request that I already did in the store on the 16th!!!