Suspended Line

You guys did not run a debit order for December , my account went into arrears for one month , yesterday you suspended my line . I paid R350 yet my line is still suspended , this is not the first time this has been happening .3/4 months ago you did the same thing , I requested for the debit order issue to be fixed . I went as far as asking for a debit check mandate , but still you guys do not debit and I had to pay manually . I sometimes forget to pay manually hence I requested a debit order. I really do not understand how my line can be suspended because it is only in arrears for one month . This is totally unacceptable , taking into consideration that it is you guys who did not run the debit order . Can I get someone to attend this ASP , this is frustrating and causing a huge inconvenience for me .