Careless Sanlam

My mother set up a trust fund account with Sanlam in case she passed away but unfortunately she did a few years ago. Since then Sanlam has been little to no help, I have to beg for the money my mother worked hard for to make life a bit easier for me when she's gone but Sanlam is making me suffer. I have left them emails that they haven't responded to in months, when I call no one picks up the phone no matter how long I wait on hold. I'm starting my first year this year and I'm afraid I won't be able to register in time because I fear by the time they do respond it will be too late for me.