TFG donA AAat know their own database system

This issue has been ongoing since early last year & TFG STILL can't get it resolved. My old cell phone number is somewhere on your database & every month you persist in sending an SMS to that number with my instalment & balance details. As explained previously, I no longer use this phone as it was given to someone else! HOW MANY MORE TIMES DO I NEED TO RAISE THIS & WHY CAN'T YOU GET IT SORTED OUT? I contacted Roseanne Ovies in December & she YET again assured me that the matter has been sorted out... clearly, it hasn't & whoever is responsible seems to be unable or unwilling to fix this. Is no-one at TFG competent enough to resolve this?