Telkom Mobile account charged R5600 to migrate

I approached the Greenstone branch was helped to migrate my telkom mobile internet account. from 15 Gig to 50 Gig for R699 pm, all was eventaually approved after being an account with Telkom mobile for over 3 years. <br> <br> I Migrated with the promice of no fees attached, as i already have the device and was only migrating to a bigger package, was told there is no fees when i get my statements, Telkom charged me R5600 on calling telkom and queriying this, was told they have never seen this before, well someone had to have entered that amount to bill me., as usual Telkom takes no resposibility and passes the buck between telkom mobile, from logging the complaint on the 4th february, evetually after a month get told to go to the strore to sort out, we are now almost 2 months later and still not sorted out, telkom Greenstne passes it to Telkom mobile and telkom mobile pass it to the store, surely there has to be a Credit manager that can simply take this and sort it out, really What else is possible?