Bad Service

for the past 2months ismart have been debiting my account with 359 every month for the past two months. i have made several calls to enquirer as to why i have not received my monthly subscription airtime and sms`s. the first call i was told my account is in arrears, the second and third call i made i was told different dates that i will receive my monthly subscription but still in vain. the last call i made was yesterday, only to be told that i should expect my subscription from yesterday. when i request to terminate the contract because they are failing to deliever , am told that i have to pay up the remaining amount of the contract before terminating it. this is unfair