Not Keeping to the end of their bargains

I started using supersonic in Jan and unfortunately at the end of Jan I got retrenched... So I couldn't pay supersonic... But I was still using supersonic. On the 23rd of July I called in to make an arrangement with supersonic so that I can pay my balance end of September (started working in August) and the person who called me assured me that I'll still be connected till end of September... Another lady called me and said she will arrange for my connection to be reconnected... I understand that I'm not connected because of non payment - but I was assured that I'll be connected till end of September.

Now I'm unable to work because the connection is off but I was assured that I'll be connected to the end of September.. if they didn't assure me I weren't going to insist and made another plan.