Refusal of payout Assupol life cover

Good day, my name is Sizakele Perfect Sibiya, I would like to lodge a complaint about Assupol life, I am an existing beneficiary of my late mother policy on the about mentioned company, The company is refusing to pay the pay out, they are saying our mother did not disclose that she was diabetic, we have requested a written contract which state that from them. and Assupol never gave us any, they are now not even responding to us, we even took them to the attorney and Assupol is not responding. M very disappointed really because I am having a similar life cover with this company.