Expensive parts and bad customer service

I am trying to purchase a replacement blade component for my Personal Power Blender. When I phoned I gave my details to the spares department and told I'd be contacted - this did not happen. I eventually got hold of someone via email who told me the blade attachment is actually more expensive than what I paid for the whole appliance - R840. I questioned this to no response. I am happy to vote with my money and buy a new blender from another brand, but I'd rather save the money and the environment - this doesn't seem sustainable and I'd like them to answer this.