<human>: Provide a brief overview of the text.

I am based in England (UK).

**13/06/16:** I ordered an array of 30 beers

**15/06/16:** I missed the delivery

**17/06/16:** I collected the delivery however it had been damaged causing my delivery to be missing 3 bottles - The delivery company did not stop me from collecting the repackaged goods.

**18/06/16:** I received the delivery again as ordered. 

**19/06/16:** Emailed the company on this date explaining I had received double

**20/06/16:** Was told it was a postage error, asked if I would like the delivery to be collected or whether I would like to purchase it on a discounted rate (it's also less than 3% discount so i'm not best pleased)

Am I under any obligation to give these goods back? 
They were essentially replacing an ordered, however the delivery company didn't keep a hold of the goods for them.
<bot>: Sent a delivery twice, I told them, they've asked for it back/money, what do I do?