Business Account Promo Experience

On November 14th I walked into a russell cellular Verizon store and talked with one of the managers and she told me about this 5 lines for $50 promo on the business plan. Thats half of what I was paying with t mobile for 5 lines so I obviously said lets do it. We switch everything over and ported over my 5 numbers from the mobile. Apparently the promo didn't apply automatically so I went back in and the same lady I talked with said she was going to call in and take care of it. Fast forward to the 20th and she tells me that she sent off the paperwork to get it fixed and to get me bill credits. I'm now stuck with a $299 bill which is more than I was paying at tmobile for less features and she's pretty much ghosted me and verizon customer care tells me they can't do anything about it and to visit the store I switched over at. What are my options here?