poor service from the customer agents

I have a contract with cell c and I didn't pay my account for December. I was called earlier this month by a one of the agent and I made a payment plan for end of January 2016. today they suspended my line and I called them to explain to them that there was airtime worth R259.00 loaded by my company can they please open my line so I can transfer that airtime to one of the colleagues number as my company need us to use that airtime daily. they Ntombi mbenga gave me attitude and told me that can not be done and I must first pay then they will open the line. that is ****. my company need that airtime they loaded today I need this sorted out as this is nonsense