Who do I contact to get Verizon Wireless to put me on the plan they promised?

Question

My daughter got talked out of an unlimited account when she got a new phone by a verizon salesperson who told her based on her 3g usage she would never go over 2 GB of Data on a new 4g phone. (Which was totally untrue because with the same usage, she used more bandwidth every month on 4g)  They put her on a 2 GB data plan when they were offering everyone else who had unlimited plans a 6 GB plan. After we called back to question this, the agent agreed that since the 6 GB plan was available at that time that she should have been offered it, and they would take care of it.
Fast forward several months.....NOT FIXED STILL
I have spent many hours on the phone  for many months now, with many agents including Mark, Terry, Todd, Vanessa, Tim, Swasi, and Nadia to name a few...who all promised to take care of this. They apologized, gave a credit for the overage that occured one month due to the smaller plan, and said they would get the appropriate department to make the change. The last guy said since he couldn't get us on the 6 GB plan yet, he would put us on the 5GB plan and credit back the $20 difference EVERY MONTH and that the credit would not stop as long as we were on the 5 GB plan. He would then pursue the 6 GB plan. Each time they say call back in a week (so I can talk to a new person and explain it all again for an hour....and not get it fixed again!!!!)
For a long term customer with 5 lines and a long history, they sure don't make you feel like they care...and they don't make good on their promises as far as I can tell, because we are  still not on the 6 GB plan (that still exists and they still offer to people!!!) and we are no longer getting the $20 credit for the 5 GB plan they put us on in the meantime with a promise of no fee increase. Now I'm told the request for the 6 GB was rejected and that verizon does not plan to do anything or credit any money as promised.  "Sorry, we can't put you on that plan". (even though several agents and supervisors approved it and said they would take care of it)  This is SOOOO incredibly frustrating. I HATE being lied to and I hate it when a company does not do as they say they will. This is very poor customer service.
Up until now, I was happy with verizon, their service, and the phones, but now I am looking at when my plans expire so that if they can't make good on their promise I will plan to  move my 5 phones and my 2 parents and  2 inlaws and the rest of the family's cell service to AT&T. They offer a larger corporate discount  and rollover minutes too.

Answer 1

@Verizon Wireless Customer Support
Matthew:
When I search for MatthewS_VZW on Twitter, I get a message that there is no such user. I only see Matthew44vzw and matthewvzw. Are either of those you?
Since this is a verizon wireless forum, I presume that the VZW rep has access to the email used. Other companies work this way on forums like this. If you do have access, feel free to email me, if not, please give me the correct twitter handle and I will follow and DM you. I am getting pretty frustrated with all this.