Totally disgusted

I'm very disappointed. I ordered a father's day gift online and made an error because their website was not clear, but that was my mistake. From the day l ordered, the Sunday 31 May l sent my first email. Monday l phoned and an email, Tuesday emails and calls. Wednesday the same, this is getting urgent. Thursday I'm told that the order is at the courier ready to be delivered. I'm fuming, l tried everything except fly down to the courier and physically take it out of the package. How do you return item given as a gift, even if they are double?