Mtn Pnp Centre Table View shocking service

Mtn shop Pick pay Centre Table view On 30th of May this year i downgraded my contract.It is now 7weeks later and i am still receiving the incorrect acc.When i enquired about the problem the excuse was it did not pull through on the system.My acc is now more after the downgrade than before.The people at Mtn store in Pick n pay Table View cant resolve the matter.There is no sense of urgency from the Mtn shop side to help me Can anyone from Mtn help me ?