Pending orders over a month

I am a new seller, started in July. I have 80 total orders, with 62 of them pending, for as long as 4 weeks. 12 of the 62 are over 3 weeks old. All of these orders are of items from shipments nearing a month in received status. All the item counts are correct and no problems with the shipments. I can’t imagine a buyer is still going to be wanting things they ordered a month ago. 2 of the 12 oldest orders are business customers so I doubt they don’t have a verified payment option.

I reached out to support via chat today and the rep was useless. Pretty much wanted me to retype or explain in another way what i typed here. And also wanted order numbers, like can’t they see my order numbers? If I can sort via ascending, I’m sure they can too. Was not impressed and finally gave up.

Is it normal to have orders pending over a month? I feel like this is just tying up my inventory. If someone’s payment is not verified in a month why can’t I cancel it? Or is something else going on? Any ideas?

Thanks in advance for any insight.