Outstanding amount sms

I am receiving numerous sms from One Plan Health Insurance stating that I owe them some money, amount of R611.55, My account was debited off this amount and One Plan Health asked me to provide the proof of the payment which I did. An email was sent by Zarina Hartley confirming that the payment was received and they will advise the IT department to stop sending me sms, however this has not stopped.<br> Today I received an sms from One Health Insurance stating that I have been handed-over and I must pay R350 by tomorrow.<br> <br> This is so annoying that One Plan Health is trying so hard to recover money from me whilst I don't owe them <br> ( this is ***** by One Plan Health Insurance). I regret the day I signed up for their service, I will be opening the case at police station for harassment and ***** commited by One Plan Health Insurance.<br> This is the last time I am asking you remove my name from your list. I HAVE NOTHING TO DO WITH YOUR COMPANY, PLEASE STOP. THIS POLICY WAS STOPPED A YEAR AGO