Kenwood Airfryer oven rusting bad

I purchased the Kenwood Airfryer oven from Takealot. It started rusting even it is in great working order. I returned it a month ago and apparently Kenwood carries the warranty. Now Kenwood won’t honour the warranty as the appliance is operational and they revoked the rest if my 2 year warranty because of the bad rusted condition it is in!!! I want to talk to them myself but Takealot says they will contact me. After three requests I’m still waiting. What happened to Kenwood’s reputation and service excellence? I will never buy from them again!!