Ariston MD554IXA

Both Ariston microwaves are rusting! I moved into a new build home. I live a quiet life alone. I have 2 of the same Ariston microwaves. The one that's rusting the worst has only been used 3 times for warming plated meals with a cover on. I reported this to Harvey Norman, who gave me the email contact for Ariston. I emailed them with photos. The message was 'mail box is full' This happened 3 times despite being provided with alternate emails. Finally, they asked for more photos. I was asked how I cleaned them. "Nature's dishwashing liquid, a clean cloth & water." Answer - I should be using a steel cleaner. "I've used 3M once with no effect." No I should have been using their one, a picture was provided. They said the case was closed as I should have followed the guidelines! Correspondence took over 3 months! I looked at the manual - 'Clean with a damp cloth, pH-neutral detergent as required', no other information! The products were very expensive! THEY ARE NOT FIT FOR PURPOSE, NOT OF ACCEPTABLE STANDARD! THE SERVICE WAS APPALLING! Now my Ariston extractor is not working! Only used 6 times. I was told that someone would contact me over a month ago! NEVER BUY ARISTON PRODUCTS!