is there any way to rollback or downgrade softweare ?????

immediately after auto update to 20.50 my fenix 6x destroyed and dose not work at all. i ant to know is there a solution to downgrade to 20.30 . unfortunately Grmin support could not solve my problem. the watch even can not reset factory!!! garmin connect and garmin express did not recognize the watch!!! no one in garmin support can help me and in fact they dont know any thing at all. is there any way????