Dollar General complaint: Online Pick up Order

I placed an online order and made a time to pick up. I don’t feel good so I send my children in to get it for me because honestly I may have covid. When they get in there the lady. I believe her name was Ashley told them it wasn’t ready, she was the only one there and hasn’t had time to get it. They ask her when we should come back and she says she doesn’t she’s the only one there. So I go in and ask her when she thinks it will be ready, my pick up time was between 11 and 12 and it was 12 and I places my order before 9. She tells me she doesn’t know she’s the only one there, so I ask her how am I supposed to know when it’s ready because I have alreafy been charged, again she says she doesn’t know she’s the only one there. I ask her if I will get a text or email and she again says she doesn’t know. No quicker then I go back out to my car does my order get canceled, i called the store and she said when she checked my order was canceled. I believe she canceled my order. I’m pretty pissed, if they weren’t able to get my order ready in time at the very least I should have been notified and my order shouldn’t have been canceled.