I got my bill from Charter today and they still said I owed $10 more than I needed to pay from those promo coupons they sent me back in like March. I put the final coupon in for my June bill. Now for the August bill it still isn't reflected. I decided to call them about it. I told the guy that I called the first time this happened and they said it takes a cycle to show up on the bill. Well it's now been two cycles and it still hasn't shown up. So they guy said he just took both of them off and reduced my bill by $20. My response was "well I only needed one...but okay!" and he said "Well might as well just take care of both of them now."
But I think I won't take my chances on this one and just pay them the correct amount with out the addtional $10. We'll see what happens on the next bill.