Cancellation of Reward Credits without knowledge

I accumulate my Clicks reward credit and purchase something over the festive season. I got to the cashier today and was advised that I had 56c rewards. I was not even aware that my points were going to expire. This is unacceptable, not even an sms or e-mail advising me and they have all the details. I would prefer to go shop at Dischem where your points does not expire