Item sent for repairs waiting for weeks

I bought a brand new generic ps3 wireless controller at cash crusaders table view. I only found out it was defective a week later. Unfortunately it was past the 7day return policy to get a refund or new one. As such I had to book it in for repairs on 21 August. This I had no problem with and understand that this is there policy. I was told it will be repaired within 21days. It is now 7 weeks later and I had no feedback. I went to the store to find out what I the problem. They couldn't tell me where the controller is or if repaired or not. I asked to speak to the manager and was told he is busy and I must leave my number to call me back. This is very bad customer service. The right thing to do is listen to your customer. As it has been so long I would expect a replacement whilst they resolve what the issue is. It's not fair to me the customer to wait so long for a product I paid for that was defective and sit with nothing. I would appreciate it if cash crusaders can resolve this and I do expect better customer service than this.