Jet store has poor customer service

Last week I paid up my account in store and asked for my account to be closed. They called the customer service and I was promised that I'll receive an sms notifying me of the cancelation of my account but till today I still have not received the sms. Why should I struggle to close a paid up account? Where is the professionalism here. Since I have proof that I requested for my account to be closed, I will not pay any cost that will appear from this account and I will take them to court if I have to.