Woolies becoming sly in how they process deals, not Transparent

Of late woolies doesn’t resolve one’s query, I remember back in the day when you sent in a customer service query or complaint, they would be on u like glue to fix it. These days they make one lame excuse then that’s the end of the story. I have informed them multiple times that their vouchers system has been changed recently and they are not being forthcoming with the vouchers and how it’s app****. Previously if u bought something on a deal or promo and received a rand off voucher the rand off voucher will be deducted in full at the end of transaction, it seems their new system only deducts a portion of the voucher when it’s promo items and this was never the case, I understand retailers are trying to save where they can but it’s coming at the expense of their clients, watch your receipts closely and see how things have changed. I bought three for two. If total is 1200 for instance and I now present my R400 rands off voucher why is the total not R800, one loses up to R100 on this transaction cos they switched the order in which discount applies first, but switch the rules when it’s a % off voucher which they then apply at the end, double standards