Unreasonable

I have an account with them and they are threating to black list me for an account which only requires the current installment,they have been harassing me with me calls and sms's.they have even blocked my account for purchases. I did fall behind only once with my account and that was due to me being retrenched and I have since submitted my documents to the email provided by their store. I would not recommend anyone opens an account with them ever as they are unreasonable.