Harrassment regarding overdue account

I am continously getting emails and SMS's about my account being in arrears.

I called in on the 12th Match at 10.39 to query this.At the time your agent provided me with an explanation that made no sense and I asked for his manager to contact me....a week later and I am still waiting.

I called in yesterday and spoke to Nina after recieving an SMS that my account was handed over...she advised that this was a mistake on Vodacom's part , and said this will be corrected.

I now get a final demand letter.

Can you get your accounts department and collections department to communicate to each other and correct your records.

I do not appreciate being harassed by unnecessary sms's and emails.

Mrs Joseph