deaf ears now that you have my money

So I purchased a fridge at Game 9 months ago with the buy&get promo. I am having multiple issue where the vouchers are not being credited. I have called so many times and emailed buy and get but no response. This is unacceptable as I was promised these vouchers when I bought the fridge. I could have easily chosen an other fridge but the Samsung sales guy insisted it's better value for money and the vouchers are amazing. I called Samsung as well and not gotten any help at all.