Instacart review: Reimbursement request repeatedly denied

I am a new Instacart Shopper. On my first delivery order 10 days ago I paid cash out of pocket. Part of the order went through fine at checkout, but when the customer returned one and added two additional items the amount was declined at checkout twice. I ensured the new items were added to the order by calling customer support, I gave her the new weights and costs and I could see the update on my screen. The help number provided in the app at checkout was not in service when I tapped the link to call. In the interest of food safety (there were perishables in the order) and customer satisfaction I used my own cash assuming that everything was clear and straightforward. There were less than ten items involved and all the receipts clearly listed everything. I initiated the reimbursement request the same day.

Since then I have spent multiple hours chatting with shopper support pleading for a resolution. I have received three separate rejection notices via email, in spite of support reps repeatedly promising that I would be given a full reimbursement. Each time I chat I am required to explain the issue in detail and provide photos of receipts, which I have done over and over again. Such a huge waste of time and energy. Extremely frustrating and disappointing. The supervisor I finally was able to chat with today was the worst of all. He was no help and could provide no information about why my request had been repeatedly denied. I am not able to respond directly to the emails nor speak to anyone other than the chat. I am caught in a doom loop and I am at a financial loss after following all their guidelines and rules. I am happy to provide photos and screenshots if requested. I am not sure if providing them here violates the terms of the Instacart Shopper Agreement.