You're not the first one to accidentally order carts or chips for the wrong printer model, but luckily yours is an easy solution of getting two new chips.
All the reset chips you currently have attached to your carts will work in your 3880 printer, except the M/VM and LM/VLM. The color position labels on the carts all read "magenta" or "light magenta", even with the 3880 carts, but the chips specify the color position the carts can work in (this is how we receive them from the manufacturer). Without a 3880 VM and VLM reset chip attached to these two carts, your printer won't accept them.
We can't exchange the chips you have for the ones you need, because we would have to test and repackage the 3800 chips you have, before adding them back to inventory, and since you bought the carts about 6 mo ago, they are well beyond our return/exchange period.
Please let me know if you have further questions or there's anything else I can help you with.
Best regards~ Dana