Unable to cancel my medical aid

I called the call centre on 29th April to give them my 1 month notice to cancel my medical aid. I was told that Momentum needs written request. My daughter then sent the notiication and was then sent a form that needed to be completed. (9th May ***) The form was completed and sent back. A week later i received a response saying that the email address is not a valid one or recognised on the system. (Another reference number ***.) I called the call centre again trying to verify the details they have and no luck. I do not have an email address hence my daughter has sent it.<br> I have given enough time to try and cancel this medical aid and i do not want to pay 2 instalments by the 1st of next month. <br> ALL I WANT TO DO I CANCEL THIS MEDICAL AID AND MOMENTUM IS MAKING IT EXTREMELY DIFFICULT TO. IF THIS IS NOT RESOLVED I WILL CONTACT THE OMBUDSMAN.