Internet bill surges after current contract ends

Hi,

My current contract expires soon. I just noticed my monthly charge will go up by more than $50/month. It is really too expensive. I only have 3 devices to connect and the existing plan sold to me last year is an over-kill. During this bad economic time, I only want to keep the old monthly charge the same and am willing to downgrade the speed. When I called the customer service, I was told the cheapest plan they can sell me will still be 70% more expensive than what I pay today. Can you help me out? 

Thanks.