Momentum a very confused business

I keep herring messages about a investment with Momentum that I thought I had terminated years ago. I get these messages every couple of months over the past year or so. I initially ignored then but a while back called them. They asked for my ID number and told me I do not have a policy with them. The messages kept on.coming and a few times I did the same thing with the same answer. Then they stopped for a boy and now started again, I called the all center and was told after giving my ID number that I did have an active investment with them, but that they had been struggling to get hold of me. I was very confused, so they message me on my cell phone number but they have no record of any contact details so could not track me down. Wow , how does this work???? They asked for my email address to send me paperwork to fill in to verify my details so they can send me details on my policy, have called twice and was told it was sent, never received anything.