Worst cellphone contract upgrade experience ever!

<p>This company is supposed to be used by MTN as a third party/ consultancy to assist MTN users to upgrade from the comfort of their office/ home. They phoned me and my husband to upgrade on 13 July 2017 and all went well until we tried to change something on the packages we chose only, not the PHONE, only the PACKAGE! They were rude and did not allow us to change because apparently everything was finalised already even after they have said on the 13th that we can call if there are any issues within 7 days and Kollonade MTN confirmed we have 7 days to make a change. The only way they could assist was for us to cancel the upgrade and start from scratch which I do not understand taking so long, because now since Monday 17th we had to wait for 72 hours! !!! We can't even go to the MTN store to change the upgrade because it is stuck with them. They RARELY answer their phones and when they do they drop the phone call, are rude or not helpful at all. I will never work with this company again. MTN must remove them from their third party assistants, because even their call centre confirms their other customers are having the same problem with Summer mobile.</p>