Dishonesty of the returns dept.

I bought a generator from them, 5 months down the line. Their product is faulty, that it damaged other appliances, so I logged a return and asked them to exchange or send it to their supplier but I made it clear that I dont need the refund I need a generator. They said that particular brand and model is now out of stock, but upon attempt to repurchase it, the purchase went through not saying anything about the item being out of stock. I dont know why the person who was assisting me is lying ( Ashlen. R). I can take the legal route regarding the matter by the way. This just proves all the negative reviews I have been reading about regarding the entire store and its dishonesty