Incorrectly upgraded cell phone contract

I authorised an upgrade to MTN sky contract for *** and incorrectly my personal contract *** was upgraded. After various promises to rectify it, nothing has been done. I have paid the average amount of my cell phone account ***) and it has been suspended because I did not pay the full amount for the sky contract. After being promised that the matter would be sorted out, and leaving messages that she contacts me, I have not got any calls or change in the status of the accounts. I am leaving for Tanzania on Monday 18th May for a conference and would like to have phone(s) that work correctly.