I think your startup needs to choose between negotiating monthly bills or renegotiating debt. Two different animals.
There have been countless bill reduction startups in this space that failed. Throw in the fact that cable/satellite television companies and internet service providers are now straight-up not negotiating at all in many cases, throws into question your business model.
Also, there’s no way I (and probably a fair amount of other people) am going to assign money and pay your company, instead of paying the cable television bill, internet bill, phone bill, utilities, or whatever else you negotiate. I may not be your target customer, but that’s a big warning sign to me.