Peter England — Not getting refund

I make an order from Peter England site.that time my payment was showing successful.but later they cancelled my order and promised to give my money back within 3 business days . But it has been 7 days no money is credited in my bank account . Whenever I email them, they just reply me with a case number saying that their executive will contact me soon . but no-one contact me till now.I am totally confused and hurted with their services . please give my money back.