One of the option is to try a New UPI app. IT MIGHT WORK
Give it a try. If you have Paytm, Payzapp, Phonepe, BHIM already installed,
try a new UPI app (slice, Cred, Kiwi, anything appart from what you have installed already). 1 or 2 trasactions will go through and then you will be stuck with this again. Its a TEMP solution which MAY work.