No response to requests for assistance

My father passed away last year, I have been trying to contact Stanlib ever since as there were two policies paying out and I need to update for the beneficiary to receive whatever is due. I recently received notice that they were unable to pay into the now suspended bank account and even replying to this notification gets me nowhere in resolving the issue. Half of their website does not even work e.g. knowledgecentre.

Please do not call me I struggle to hear voice calls and require written correspondence.