Shockingly poor service

I resigned from FNB 5 months ago, and elected to keep my FNB provident fund with Momentum FNB's fund manager of their provident fund. A few months back I logged into the Momentum website with my ID number and it did not reflect that I had an investment with Momentum. I phoned and I was assured the money was there and that it would reflect on my account when I log in again. Now 4 dasys ago I logged in and still it says I have no investments with Momentum - this time I queried it on the Momentum website, why can I not see the investment. And 4 days later I have still not received any response from Momentum.