Bad service from my insurance company Standard Bank

My name is Deon E.Oliphant. I have a policy with Standard Bank .On 7 August 2020 I received a letter per e-mail from Standard Bank informing me that my policy had been amended and that I am going to receive a cashback bonus during November 2021.On Monday 8 November 2021 O enquery about when I can expect the cash back I was informed that the cash back will only be in 2023.What bothers me as that the only letter i receive from Standard bank to inform me about my cash only to come and here now that there are changes.I just feel they should have send me another e-mail informing me that the date had change because now my expectations was raised for nothing