Complaint on Standardbank

Standard bank UCount cancelled my rewards points of over R2000 stating that I missed a debit of R22.10 over 3 months of which I was unaware of and I know for a fact that there has been money in my account in the last 3 months. they claim to have sent me multiple notifications of which I only received 1 on the 19th of september. when I called to enquire about it at the rivonia branch at 1st the consultant told me there is nothing they can do after it has been cancelled even after I told them I did bot receive the multiple notifications they are talking about and they claim to have sent me emails which they claim not to have been successful, awkwardly so but they managed to email me to confirm my complaint! I am very upset about the bank taking me for a ride and dont understand how you forfeit your own rewards which you accumulated. I have lost confidence in this company and feel that they are taking me for granted!!!