No replacement after 4 months

I bought a "online only" item (toaster) on Makro Online. However the item had a small dent on arrival and I registered a return for replacement. After about 2 weeks the item was picked up. Since then I've been waiting for 4 months, phoning repeatedly and spending upwards of 100 minutes on phone calls with the call center. Excuse after excuse and no one taking ownership of the problem to simply send a replacement item. The last excuse was that the item is out of stock at the suppliers, which is unacceptable as the supplier is advertising and selling it on their own website. I phoned and confirmed that the item is in stock with the supplier. It has now been 4 months.