Defective juicer, refuse to refund

I purchased the demo juicer from Homemark. The juicer was sold as a demo, but not defective in any way therefore I purchased it, albeit against my better judgement as I have had numerous experiences with homemark products where it does not do what its supposed to do. I got home and when i attempted to use the juicer, pulp had spilled all over the machine, onto and into all the nooks and crannies including the motor. The juicer has a special compartment for pulp, it is not meant to spill all over, especially not from the first use! I cleaned up the machine and returned it back to the store in 3 days, with my receipt, and the assistant claims this is how the machine works, and refused to take it back. I have since purchased a russell hobbs juicer from Game, what a pleasure! In terms of the CPA, the juicer from Homemark is defective, and I am entitled to a refund, replacement or repair, its my call. I would like a refund.