Unpaid Accidental Death Claim

I took a policy with Sanlam 05 09 2018 and covered my brother who is now late Jaja xolo.I submitted a death claim on the 19th 12 2018 for my brother who committed suicide and Sanlam has been calling and sending sms's to me requesting that I must submit Inquest and post mortem for them to finalize and pay my claim. I submitted all the documentation on the 18th of February 2019 but only now on the 18th April they phoned and told that they decided to decline my claim because my brother committed suicide and the policy was not six months old according to the waiting period which was never stated by Sanlam advisor when I took a policy with them. I was only told that if any of my members dies unnaturally there is no waiting period. Kindly assist me in this matter I feel that I have been treated unfairly by Sanlam. I am hopeful Justice will be served. SANLAM must pay me as promised