Why a yearly hassle?

Why a yearly hassle?  We have been Cox customers since 2006, but every year we have to call concerning increases in our bill.  This year we received a 42% increase so I had to call to receive the yearly special deal with a 12% increase.  Why can we not receive a fee that stays the same every year, granted there may be cost-of-service increases?  42% and even 12% increases are unreasonable.