How and where to file complaint against Verizon's customer service?

Question

I hate it that I had no one to give my business to other than Verizon in my area. 
I've had Verizon in early 2000s when FiOS was first available in my area, but the speed sucks so I was better off switching back to dial-up. 
Many years have passed so I thought I would try Verizon again as I've heard good things about them. I signed up for the bundle service in 2012, and it's been an internet living hell when you're paying $140 every month and had to struggle daily to get connected onto the slow internet that takes 3minutes to load Google search page if you're lucky (my plan is 50/25). 
I've had no internet connectivity on the 2nd floor of my house and I've contacted Verizon many times about it. 
First time I'm told the router they provided could cover 100K range, so the problem might be the internet speed. I naively believed them and upgraded my service and got myself locked for another 2year nightmare. 
Second time I contacted them I'm told their router could only provide good connectivity if you're within 20ft range. Intersting enough the tech who first installed the modem placed it at the farthest corner of the home that's tucked away from the rest of the house. I already told him that the internet sucked when I had Verizon FiOS when it first came out, but he said let's try place it there. So I think it's only reasonable to have Verizon to send someone to check and see if relocating the modem would solve my problem. The rep told me that can be done at a $154.98 service fees, all the same time does not guarantee that the internet issue will be fixed. 
The online customer service person I spoke to has shown no regards on HELPING me to SOLVE the problem; she sounded like she just wants to set up an appointment, collect the service fees, and be done with me. This is not the kind of customer service I expect from a respected carrier. I'm just a frustrated user who wishes the service provider could provide some kind of assistant on helping me utilizing their product. The customer service reps I spoke to has reflected poorly on Verizon, and it certainly tells me you guys don't care about your customers since I'm already trapped in a crappy contract, which you'll get the monthly fee or the termination fees, one way or another. Also, your reps are giving out conflicting and false information. And I'm left on my own to figure out a way to deal with this internet mess. I will be an advocate on the bad experience I've had with Verizon, and as soon as other companies start offering high speed internet in my area, I'll switch in a heartbeat and encourage all my neighbors and friends to give their business to someone who might care a little bit more about their customers. 

Answer 1

I feel your pain. That is why we left them ............could not stand the poor customer service either. By the way, we have netflix. Although we had the step up internet connection, netflix was frequently buffering, ot the point that it was not watchable. When we switched over to a known long island competitor, netflix operated like a rocket. So that means I was paying for faster internet connection and getting much less than  I paid for.
Good luck.