dishwasher gasket problem

i have spent R4720 since July 2021 with the bulk of that amount in 2023. Every time it is the gaskets which are 5x5x5mm sponges which if flattened causes the machine to not switch on. Every time i get charged the following: assessment fee 300 field call 350 labour 400 gasket assembly 360 This year i have had to replace them twice. On one occasion they came out 2 months after the gaskets were replaced and advised me that the gaskets had to be stretched. i enquired why there was no quarantee and was advised that parts dont hold a quarantee. if theses gaskets are so problematic has LG thought of upgrading the product.