Upfix does exactly what you are talking about. They offer a repair and return service and they are exceptional. Had a similar issue with my Mazda 5 TCM and they got it repaired and returned in no time. I did a quick search and came across the Mazda 3 TCM 2006-2014 repair page on their site:https://www.upfix.com/product/tcm-mazda-3-2006-2014-transmission-control-module-repair-tcm-tcu/
Upfix does exactly what you are talking about. They offer a repair and return service and they are exceptional. Had a similar issue with my Mazda 5 TCM and they got it repaired and returned in no time. I did a quick search and came across the Mazda 3 TCM 2006-2014 repair page on their site:https://www.upfix.com/product/tcm-mazda-3-2006-2014-transmission-control-module-repair-tcm-tcu/