After deducting for 20 years, claim free now they tell me that my policy has lapsed

I am so angry with Old Mutual. I have been their customer for more than 20 years, and now they tell me that my policy has lapsed without even consulting me. I have an OM app on my phone, every now and then I go to the App and check the balances, amounts and any outstanding amounts and it consistently indicated that there was nothing outstanding. Therefore, I was under the impression that everything was up to date. In January, I went to the App and I couldn't see my policy, then I checked my bank, saw that there was no deduction on the 1st of Jan but they did debit on the 1st of Dec. I checked the app again, and then I saw documents that said my policy had lapsed. They cancelled the policy on the 27th of December without even consulting me. No one contacted me regarding the outstanding policy. My broker does have all my contact details, but no one tried to reach me and tell me about this. How was I supposed to know that the policy is behind, if the app and WhatsApp indicated that everything was in order?

I immediately contacted my broker about this and he said he will check it out. He came back to me telling that OM said there were 2 payments missed, 1 in May & 1 Nov. I told him that I do check my App, every time and it always says that I'm good and, luckily, I even had a WhatsApp chat from OM that says I'm good which I sent it to him.

He said he spoke to his superior, and the granted the waiver. But, now they want me to pay this within the next 15 days. It is unreasonable to expect me to obtain R4,000 within 15 days, because their app & WhatsApp gave me the incorrect information.

Now, they want to score all the money I've been paying for the past 20 years? No, this is ridiculous. I now clearly see the reason why people resort to extreme actions due to dissatisfaction with the company. This is pathetic service to receive from a big company like OLD MUTUAL.