Lack of services for faulty item

On the 8 may I bought defy hob, ceramic. After one week the hob just cracked. Lodged the product complain with makro, I was helped to register a claim. After two I made a follow up I was sent to supplier who brought wrong part, and had to go back to office for correct part. It's almost 2 months now I don't have stove(hob) that I couldn't waited to have. Am so disappointed because same class I got it and hardened. Why do they keep stock, did they sell me an old item which they struggle for spares. This broken class is now becoming an hazards in my house. Someone is just disrespecting me there