Checkers & Rally's review: Overcharged

Went to rallys with my son in Anderson Indiana, had a coupon and it should have been just over $11, they charged him over $19, I went in, they were supposed to have the store manager call me to rectify the situation but it never happened, I contacted corporate, they took all information and still have not given my son back the difference from the overcharge. My son is mentally disabled!