DEFY PATHETIC SERVICE

Hi.. I bought a Defy oven and hob box set in November 2021 at Makro Cornubia, however in April 2023 I noticed an error code (ER22) on my touch(pad) stove. I then contacted customer services and a technician advised that ****roaches caused the error and I need to BUY a circuit board and would PAY for labour because it was covered under warranty. My home was fumigated in 2020 and I have a pest control certificate. This stove is less than 24 months, if I had ****roaches how could they go through a circuit board if it wasn't opened or faulty from the time I bought . How can I buy stuff and pay for a stove that is still under warranty whereas I do not have roaches in my place. I do not believe I received such a pathetic service from a well known brand..I am disappointed and livid by this. Please attend to this as soon as possible as it has inconvenienced me in such a bad way.