Investment funds disappeared we are told

My elderly mother has an investment policy with them that matured on the 1st of December 2019, a day after she went to go enquire about the funds at a local branch in Johannesburg, Randburg. She was told by the consultants that the funds had disappeared and therefore they can’t do anything to help. She then went back there again after two days hoping that something has changed but was told the same thing.

We both called old mutual on several occasions and was told the same thing if we were lucky to get through.

I myself have taken it to task to email their GS email 120 times since then with no feedback given today. In edition, I posted on their Facebook page seeking help when DM’d they but no such luck, this morning I even went to the lengths of creating a Twitter account though I don’t even know how it works, but in hope that someone will help my poor old mother who is stressed and worried that her money is being ******.