Harassment by accounts department for account already settled

On 8 October I received an account for R221.60 dated 8 July. This was the first time I was made aware of this outstanding balance for an account which I now see was already rejected by my medical aid on 11 July.

I paid this outstanding balance on 9 October and I sent proof of payment to Lancet via e-mail.

However, both my wife and I are being RUDELY harassed on a daily basis with endless phone calls, SMS messages and e-mails regarding this account.

So you wait three months to send us an account, we take one day to pay it, and now we need to deal with this constant harassment. Completely unnecessary and very unprofessional!