this person asking my personal bank account number and my address

this number and the owner send an unwanted delivery to us, please trace this person to stop his fraud activities as soon as possible

Go right ahead. Nobody on here can do anything about it. If you didn't order it and it was sent to you, and pending they have no financial information of yours, it's yours at no cost if you wish to keep it.

but we aren't sure what exactly it is, what if it give us big problems

If you never ordered it and they have no info on file, it's free goods by law. Send it back and you cannot legally be charged. Check with any creditors and see if you have received an unknown charge. If you have, you'll have to get with your bank and dispute the charge along with probably switching your account numbers.