Not Happy with the Rewards

The story begins with me buying 3 new iPhones from AT&T in March 2020.  They mailed me my phones.  I put the phones back in box as directed.  To my knowledge the phones went to a warehouse different than the trade-in warehouse.  So from April to Oct I have called.  I have created numerous cases, I have escalated numerous cases, I have applied for the trade-in online, I have talked to rewards people, I have talked to trade in people. With that being said I have been promised $900 credit on my bill ( 3 phones x $300), I have been promised $20 credit on my bill until credit is used up, I have been promised $300 credit on my bill, I have been promised someone would call me back numerous times, and been told I would get email about the status.  With that being said I got NOT what I was told, nor promised.  I expected to get a Visa card for $900 as that was the discussion with multiple ATT&T employees.  But the reality is that I have spent no less than 60-80 hours on hold with ATT&T which has a value of close to $12 an hour.  So I deserve what I was told and my hourly rate I believe.  I have no intention in recommending them to anyone and once another carrier has a special I am pulling my account away, but they have me handcuffed due to their payment plan that I agreed to.  I also agreed to receiving $900.