Billing Errors VS Contract

For almost 7 months I've been calling, pleading, and complaining about the errors on my bill vs what the charge is on my contract and for almost 7 months I kept receiving the same response... the problem has been resolved. Yet, here we are again. How is it that Comcast Business can quickly disconnect service for late payment and can't correct a few billing errors. By law, this is technically a violation of contract. I've been a patient and loyal customer, but my patience has nearly run out. Either fix the problem or compensate your customers for the errors that Comcast has made. Losing customers due to a billing technicallity is bad for business.