Incompetence from Old mutual causing a severe headache

Good day I have old mutual greenlight policies where the premiums are being deducted directly from my salary. However, the company (Sasol) I am working for is stopping all 3rd party deductions. Thus I need to switch my policy premiums to debit order. I had a phone call 2 months ago and the agent told me he is resolving the matter and the switch will be done in August. However my HR department has informed me the switch has not been done yet. I have tried on several occasions the last couple of days to contact Old mutual- Nobody is answering, I am just hearing hold music for up to an hour. Please let me know ASAP with regards to this query as it will be very troubling if my policies lapse due to incompetence from Old mutual side.