I'm going to accept a gift and then return it
Why would you accept a gift you want to return?
I don't want it and I thought it would be rude to refuse it.
It is okay to return a gift.  But, it is polite to accept a gift that is given to you.
Whatever the company sent me that gift for free and with no strings attached.
I see, then I really think there is no reason not to accept it and then return it. Hopefully you can get something you really want instead.