Low blood sugar all day?

My son was around 220 most of the night, and we noticed this morning that the cord on his pump had been damaged so he probably wasn’t getting enough insulin. We changed the site and gave a corrective dose which brought him down, but now he has been low the entire day. Basal IQ keeps shutting the insulin off, and even though I’ve given him a bunch of snacks for free, it didn’t seem to raise his blood sugar much at all today. Even juice barely did anything, and half an hour after giving him some and seeing little increase, he would go back down to 60 with the pump shitting off the insulin delivery again.

We checked for keytones when he woke up and he had none, and I’ve also verified his number with a finger check a few times and all were matching his G6.

He just has his night time snack an hour ago and I didn’t even put it in his pump, and his sugar didn’t go up at all after eating it. I’ve set his basal rate to 50% now. He went to bed saying his belly hurt, which I think might be gas but can’t know because he isn’t good at describing just how it hurts.

Any thoughts?