Dissatisfied with pick n pay ASAP

I made a purchase on Friday 13 September 2024 via ASAP. ASAP is running a free delivery special for the month of September using the promo code SHOPNONSTOP. However when I inserted the promo code on the app it had an error message "promo code invalid, promo code limit reached" so I was forced to pay R35 delivery fee. I called their customer service and was told that I will get a new promo code for free delivery up until 13 October 2024. I did not get any new promo code. I emailed the customer service and received a response that my issue has been resolved and they apologise for any inconvenience and I will get free delivery until 30 September 2024 (as advertised) and They say they cannot refund my R35. I responded telling them what I was promised telephonically. I have been communicating with Phumeza Jacobs and Zikhona (no surname provided). I feel their service is highly pathetic and I feel this is false advertising as I did not get a free delivery. This is NOT my 1st complaint about pick n pay ASAP with regards to false advertising. They NEVER address the issue, they just brush it off with a lousy apology.