UNPROFESSIONAL

I took a 24-month contract with intellicell last year with two sim cards one for data and one for airtime, I just received an SMS from them to say that my data sim card's contract has expired and i still need to to pay for the next twelve months the normal installment. Then i call in at the call center spoke to a lady called Carol who does not have any customer service that made me more upset, i REALLY NOT GONNA LEAVE THIS LIKE THIS I AM TAKING THIS FURTHER