Utterly useless service

In March I emailed vitality about 20 times regarding concerns about my healthyfood cashback. I received a response saying that they had had technical issues but that my cashback had been updated and all should be fine. I've just received R567 out of the expected R1000 cashback. I have been forced to scan every slip and draw up a spreadsheet showing what I spent on healthyfood. Their actions are useless and I believe that they are deliberately cheating their huge member base out of millions every month due to "technical issues". This is a class action suit waiting for a place to happen. I'm so tired of this! I should not have to spend hour every month dealing with issues.