Charger broke my laptop and gave me electric shock, can i get them to repair/buy a new one?

Bought this charger 10 days ago: http://www.amazon.co.uk/gp/product/B008HESIAU/ref=oh_details_o05_s00_i00?ie=UTF8 &psc=1#productDetails

Mainly because it's half the price of the official charger and recieved relatively decent reviews. How foolish i was.

After a week, i plugged it in and sparks came from the charger. My Macbook instantly turned off, losing everything i was working on. I thought it might have been a one off, so i have turning the electric off and on again at the wall, i picked the charger up and instantly got an electric shock myself. I admit, i yelped like i never thought i could yelp. Scared me though especially after hearing of Asians being shocked to death this year by non-official Apple chargers.

So thanks to this charger, my Macbook is now broke. I have tried two other working chargers, and although they 'power' the Macbook, they don't charge it. It's also been running slower and heating up more than it did before. I have changed batteries and chargers but they don't fix it, and neither does resetting my PRAM or SMC settings.

Also, this isn't some random eBay company from China. This is a British company called Lavolta who specialise in Electronics.

I've just wrote to the company demanding a refund and a repair/new macbook pro. I don't think i should have to lose hundreds of pounds because they sold be a faulty and dangerous item. I told them if i'm not satisfied with their response i am prepared to go to the press or to the police about this.

Do you think i've got a case?