false advertising my $55 plan I just signed up for is really $154 and no one will help address this

My plan in Dec 2024 was $55 for internet and TV.  Pretty good.  However my term was expiring so since I couldn't call in I chatted.  Agent told me we have a promotion.  I can keep your plan at $55 and you get an iPad for one year.  "Really" I said?  It sounds too good to be true.  No he explained via chat you will get a discount of $40 on the plan and keep your 300 MB speed with internet all for $55 a month. Then after signing the agreement and receiving the email for internet it was not $55 but was $80 and no discount.  Then later I found out that I was going to be billed additionally for a mobile line for the iPad of $55 plus no discount.  I never agreed to a mobile account. Now I have bill for $99.23 and I see I have another bill due later this month for mobile for $55.xx.  I never knew I was going to get 2 bills.  I won't bore you with a play by play here but over the next few weeks I went between chat and live agent calls each telling me this is internet I can't help you and transfer me to mobile.  Back and forth talking to agents and supervisors.  Then they told me I could return the iPad to a local store.  Oh I said I should of done this a while ago.  That didn't go well either after explaining my situation at the store to 3 different agents and a supervisor they said there is nothing you can do but go back to chat we can't help you.  Oh and by the way when you signed a new contract with one of those agents a few weeks later after your initial signing that is why you aren't getting the $40 discount because you started a new plan and the line you added is part of the old plan so if you want the discount you have to add another line.  I said what would you do if you had a plan for $55 and now are paying almost $160?  He said your plan was never going to be $55 that was an expiring promotion and I said I get that but the other agent promised me that price or I never would have signed the new contract.  I would like xfinity to be honest and say I can't get you your old rate of $55 but we can do a higher price or get a lower speed.  Not charge me 3 times what my bill was.  The store won't take the iPad back and said that it is past the date to return of 14 days.  I need someone at xfinity to help me out here.  I also asked if I could get a veteran discount to help and they said you have to do it via chat they couldn't help at the store.  This is very frustrating.  Can a real agent that can talk with mobile and internet help me?  At this point I just want to disconnect everything.  I have spent hours of my life and many wasted days I'll never get back.