Ifb Industries Pvt Ltd — AMC not provided and money paid is not being returned

I have an IFB Neptune VX dishwasher and have been using this for the past 6 months and find the product works well. However the local IFB franchises in Bangalore as well as the IFB Customer care service is abysmal. I had paid for a 2-year extended AMC as a discount price was on offer by cheque in April. They waited till July due to COVID before depositing it by which time the offer was over. They never called me once so that I could have readily and happily paid by UPI or NEFT or RTGS. They are now telling me to pay double the amount for the same AMC. In Aug after complaints to customer care one of their franchises asked me to pay the discounted price by UPI. After payment they tell me the offer IS NOT AVAILABLE. I am now running after them to get my money back. Their franchises are clueless and their customer care center does not care. Wonder how they sell good products with such bad service? I plan to dispose the dishwasher after the 2 year free warranty as I cannot rely on their service.