Need to End Service but they say I have Contract Term - I don't remember signing a 2 year contract

I am closing my business and need to cancel my Comcast Business Internet. When I called. I was told I had signed a two year contract and would need to pay an ETF of $490. I do NOT remember signing a contract. In fact, I thought I was month by month. I am extremely unhappy with this. When I go onto my Comcast Business account and try to download the contract, it (of course) will not download despite trying many times on many different servers. This is the shady stuff that makes me not trust Comcast. 

So, question, how can I go about having my ETF decreased? I have been a Comcast Residential customer for years but may quit that based on that way they are handling this. Any advice would be so helpful.