I ordered a pair of jeans from a well known online retailer, with 24 hour delivery via Evri. Four days later they hadn't arrived, so I called the store's customer services. They apologised, refunded my delivery charge, and re-ordered the jeans. But then Evri delivered the original, and the re-order, so now I have two pairs of jeans. Should I send one back? If I don't, will they double charge me later? Wwyd?