Grabdeal.com — wrong product was delivered

I had ordered for Timex Retrograde T2M431 for Rs.5995 through grabdeal.com. The order id is 5219. But the product that was delivered to me is Timex Chrono T45951 which is worth Rs.5495. When i wrote to them, they had said that they will be replacing the product. But till date the product has not been replaced and no solution was provided.