Star Health And Allied Insurance — The insurance was cancelled without any intimation

My uncle Ganesh K, 57 years old is a long time customer of Star Health Insurance. He had renewed the insurance for a period of 3 years in June 2022 and a standing instruction was provided to deduct from the credit card. 2 Payments were successful and without any information, the payments stopped going out. Mr Ganesh has his Glaucoma surgery scheduled and the insurance desk at the hospital informed that his policy is cancelled. This came as a shock to him as he was not prepared to pay for the operation. He was distressed and under lot of stress due to the same. His relatives stepped in and helped him with the money for the operation. This is highly unacceptable that without any reason or intimation, his policy was cancelled.