On Us with AirPods promotion & rebates

Believed the ad that phone and AirPods were "on us" especially when this was "verified" by the salespeople at the local store. No mention or documentation about having to do a rebate for the AirPods. I was assured that I would see charges for the AirPods and new phone on my bill followed by credits for the same amount each month and as long as I stayed a TMobile customer it would pay off automatically. I repeatedly asked about additional charges. No, they assured me. But, I was warned, the bill would take a month or two to be regular because I was getting the promotion and the new phone, etc. but be patient and the various charges and credits would cycle and it would be the same each month after that unless I changed plans. So three months of confusing bills later I called today. The representative passes judgement by asking me why I waited so long to call if I had billing questions while telling me for the first time about the rebate it is too late to apply for now. Salt in the wound is already having AirPods Pro, I did not need or want them but took them because they were supposed to be completely FREE. By the way, they remain unopened to this day. The rep then explains that there was actually a $7 difference between my promotional credit and the amount of my phone payment which means the FREE phone will cost me $210 after all. Finally, he admitted they shorted me a month of "credit" and put it on the account. Don't get me started on the home internet fiasco as that requires separate customer service calls to address. Then at the end of the call the rep asks if I will recommend TMobile to my friends and family and can't seem to understand why I said NO!!!!