I am still fighting this, and would encourage others to do so too. Currys are the retailer so it is their responsibility. Don't even contact Samsung, it is a waste of your time. Get the advice of your local consumer advice centre. Under the Consumer Rights Act of 2015:
(3)The quality of goods includes their state and condition; and the following aspects (among others) are in appropriate cases aspects of the quality of goods—
(a)fitness for all the purposes for which goods of that kind are usually supplied;
(b)appearance and finish;
(c)freedom from minor defects;
(d)safety;
(e)durability.
There is also a rule about goods less than six months old: it is up to retailer to prove there was no fault when you bought it if the goods are less than six month old.
So I am claiming that the product is insufficiently durable and/or the product has a design fault that makes the screen prone to cracking. I would urge people in the UK to claim with the retailer and to cite the Consumer Rights Act, and not to be fobbed off. Do not listen to Currys try to describe the problem as physical damage or mention warranties or guarantees. They will try to make you feel like it is your fault!
