Over Charged, Incomplete order delivered

Woolworths’ quality service is dropping badly. I have made an online purchase, my rewards voucher was processed and the amount was not deducted from to total cost of the items. I bought two items of each to make sure that I get the 20% discount, I was not informed that they were out of stock of 1 item so that I can return one of the items. This is really pathetic . Tod date no one contacted me to replace the item or not. And I have sent two emails to address the discount matter, no one has responded to those emails.