I have a Massbuild account

I have a Massbuild account. There is no month i haven't paid towards my account. As much as i have accepted the fact that, in spite of paying monthly, the debt doesn't move. What irritates is receiving sms's even after having paid. Does that mean, in spite of paying through Builders, Massbuild doesn't receive the money? Otherwise having made payments, i shouldn't be getting messages monthly to pay my account. Let alone the very uncouth & unprofessional employees who call you and only voices must be heard! Or