Delay in Allocating Investment Funds

I have processed a top up investment on my Unit Trust. Prior to completing this I was told it will take 24 hours, we are now beyond that time line and I cannot even get hold of anyone to speak to. The funds are still not reflecting under my fund! I find it very concerning that we trust this institution with our hard earned money and we can't get simple answers or feedback. I have been a client for over 15 years and now I believe I have no trust in Stanlib managing my investments,