Worst service!!!

I received an offer letter from truworths to open an account which i did on the basis of the offer letter i received wherby you get vouchers to spend upon your purchase only to find out after i made the purchase that i did not get the discounts promised as indicated. I then called to log a complaint and advised that if they cant honour what they said i would gladly pay what i owe and close the account and was assured by the complaints department it will be investigated and i will get a call back the next day. Its been 2 weeks later and i never heard of Truworths when i call the call centre i got no joy as they cant seem to know who i should speak to and the agent advised she can log a new complaint only to waste my tiame even further as its been so long for my initial complaint to be resolved. All i asked is Truworths can confirm if they will not resolve the matter so I can Go ahead and close the account with no hard feelings but no help is being offered only empty promises. Why trick people to open accounts when you cant honour what you offering. Worst service effer!!!!