Disgruntled Policy holder

I had a policy with Sanlam since 2009 and it lapsed in Dec 2023 because of missed or payments that they could not allocate.My frustration at this point is how can they not find the payments yet I have given them proof of payments not once but many times via e-mails and personally having visited the branch and giving consultants the Proof.I would like some assistance because i feel the matter was treated unfairly the years that I have had the policy and the 6 months period of investigation and the final decision to Lapse the plolicy.I mean I had been contributing towards the policy for years to come out with nothìng in the end.I have been so traumatized and depressed over this.all that I wish for is to have it re instated.