Hello Peter please help me getting my money back from Pick'n Pay

I'm sooo disappointed by Pick'n Pay, today it marks exactly 30 days since they I don't know should I say ****** or ****med by them. I purchased groceries on their ASAP on the 4th of June 2022 worth of R725, 62, however during the waiting period of delivery I received an email notification that some of the items are out of stock if I want to replace them I should notify but should they not receive new ordered items to replace the out of stock items they will refund me, which is true because on the app I saw that I was refunded R124, 20 within 10 working days. On the arrival on the delivery, the delivery guy gave me one bag and also a receipt and on the receipt it stated that 2 bags were supposed to be delivered under this order number (***)(***) and I was overcharged on other 2 items. I immediately called the store and laid my complaint I was told to call customer service, which I did and the lady asked me to send a picture of the overcharged items via email I provided her with everything she asked from me and promised that I will get my refund for the missing and overcharged items within 10 working days. I only got the refund of R124, 20 and the rest of the money I haven't received it mind you it's over 10 working days now whenever I send an email to the lady I've been communicating with she always give me the "I'm working on it" thingy but to my surprise my money is not refunded. I would like you guys to help me get my money back as you once helped me to resolve my MTN issue.