Billing Nightmare - Seems No One Can Help Me!!

Finally switched my phone and internet from ATT to a Cox Bundle after a bunch of mailed solicitations and a guy who showed up at my door (Tv was already with Cox...) based on a promise of a $120 bundle, free HBO, etc. Two months in and several calls later (with some promises to fix the billing that did not happen and a "Loyalty" department person - worst customer service rep ever- who got very aggressive and said I'm not eligible for the bundle I signed up for!!) and I'm being billed for $168 (before taxes) for a bundle that was supposed to be $120! (And keep getting billed for the "free" HBO) Ready to cancel the whole deal and go back to ATT for phone and internet and just do Hulu, Netflix, etc. - extremely frustrating!!! Not saying ATT is much better - seems like every huge company just does not care anymore and its all about churn and burn with customer services or honored promises out the window... Very sad.