Those aren't even business class companies. Focus on that... consumer service and total lack of support sold at crazy high cost to gullible customers. Verizon, Comcast, Cox, Intermedia... these are the anti-shortlist of companies. The ones no one evaluating anything would talk to. Anyone who knows the vendors and basic business approaches would have ruled these out without having ever talked to them. There are loads of good vendors out there, these are famous as the "never, ever talk to them scammers." Other than Intermedia, famous for having bad support and insane prices, the others are ISPs, which violates basic business common sense.
That's not a rant, that's explaining what your tactics should be based on. Sure they are big, that's not their problem. These are shitting companies preying on the gullible. They have no incentive to make a good product or support the customer. They aren't cost effective, they lack modern (meaning post-2000) protections and flexibility that's just assumed to exist in any real business, they don't have good support, they put the customer at risk.