We’re running under the assumption that this isn’t a case of ACR using improper codes, as they did in the past (I also don’t understand what the price of the pants has to do with any of this?), they’ve been on point with the proper codes for the last 1.5 years ime. This is an issue with the UK and EU not playing well with eachother after brexit. ACR is a small company and may well flag an account that refused receipt of an item and potentially caused a headache for them. I’ve seen E ban peeps before for other shit. It’s also kind of shit to put the onus on them to deal with this before checking the import fees situation beforehand. Or just sucking it up and reselling.
edit: not trying to throw any shade your way btw @FelixRevolt