Discovery rewards *******.

I spent R 100,000 on my discovery card without receiving rewards. When I queried it with Discovery they apparently changed the terms and conditions. I find this to be quite ********* i.e changing the terms and conditions without both parties agreeing. Their response was very ambiguous and apparently they sent me a mail stating this. Then I asked for a copy of the mail, that was a week ago. The communications department are too high and mighty to speak to a customer. Ref 46043