Account harassment calls

What a Harassment of a company!!!!

I made a payment arrangement when I was on maternity leave. first 2 months went well and then the harassment started, they will phone 20+ a day to say your account is in arrears and even though you mention you have a arrangement in place they will then just call another 20 times tomorrow.

I settled the account of R2800 AND CLOSED IT (with confirmation email from them) and guess what?? they phone again to tell me my account is in arrears!!!

I have asked for a open vacancy at their companies Debtors department to show them how you reconcile accounts because no one working for Mr Price knows their debits from their credits or anything about communicating to one another if a account is paid and closed