Call center unable to rectify system error

I have an existing mobile contract and its due for an upgrade. I visited a store to upgrade and cannot as the system shows account is archived. Since Tuesday the store has being in contact with the call centre to change the account status to active. The call center has given numerous assurances that it would be done in next 3 hours. Since Tuesday 11 Feb till now nothing has being done. I have just returned from the mobile store. The consultant at the store call called twice this morning. I am scheduled to depart the country tomorrow. Really pathetic service