Disappointing customer support from a supposedly reputable company

I purchased a Hisense dishwasher 2 years ago and the covering of the baskets split revealing they very badly rusted. This despite using the their recommended product for cleaning. I contacted Hisense in October 2024; with the request for an explanation of why this happened and a guarantee this would not recur when purchasing a replacement. Their response was there were no spares available until after the 15th December. I contacted them again on 5th January 2025 and received a quotation for an amount of R2139.00 and a delivery charge of R240.00. No explanation was given. On again making contact I received a mail on 15th January stating: ' We regret to inform you that we do not have any spare parts available for your required part, we will revert back with an ETA as soon as it is made available'. I am disappointed by the company's lack of accountability and level of customer support.