I want to buy another laptop. At the moment I have already ordered a cash on delivery and do not know if I can cancel it in time. Is it possible for me to refuse the package to the postman and tell him / her that this package should be sent back?
Of course, you can refuse to accept it.
You can ALWAYS refuse acceptance, but that does not change the purchase contract.
You have to, if you are at a trade. Seller has ordered, continue to revoke within the time limit.
If you have missed this deadline, you are bound by the contract of sale, this does not change the refusal of acceptance.