Sale items never in stock, half of basket not in stock

Terrible service, this is now the 3rd time Im shopping with them because I believe in second (well 3 chances) before leaving a negative review. Each of these took place on different months at least 4 weeks apart. Each order always has multiple items out of stock, usually half my basket. In fact the most recent trip had one shop that had absolutely nothing in stock. Yes, I ordered 20 items and 10 of them out of stock, 5 all from one shop, most of these are basic groceries that I always find when I go in person. My theory is that they mark these items on sale on the app to draw us in, then boom it's out of stock as in store it's the normal price, now our money is in their wallet, we don't think much of it and just decide to use it on the next trip witg them. Worst part is they do no update what is in stock or not, I would then check on the same day, but later or even a day after and the a few days after, and still those items were never marked out of stock. I dont know what scheme they're running but I will not be leaving my money in their wallet as I usually do, I want my money refunded into my account with the same quickness it was taken. On top on that, the tracking does not always work, if it happens to work you dont get notifiedthat they've arrived, you have to be glued on the tracker. Order does not come within the time frame. The shoppers don't always update or offer an alternative. How does one shop not have not a single item available yet the shopper was just at the previous shop, makes me wonder if they went to the next shop at all or just decided it's too packed and marked it all as not found. These were items Pnp always has, how is there nothing all of a sudden? When I questioned the shopper she did not respond. What should be such a useful app brings more stress then anything. Now I have to go to the shop anyways so I want money asap,hopefully they stick to their 1-3day refund.