The company also said it would take several more weeks to resolve issues relating to the attack, which came to light last month.

British retailer Marks & Spencer estimates that a cyberattack that stopped it from processing online orders and left store shelves empty will cost it about 300 million pounds, or $400 million.

When will the retailer be back to normal? - The retailer has said a recent cyber attack will cost the firm around £300 million.