Trade-in rejection, even the phone works perfectly

On 1/14/2025, I received a package from the Assurant with my trade-in phone. The reason of rejection was that the trade-in phone (Pixal 6A) could not power on. I immediately checked on the trade-in phone and found that it could be turned on perfectly, with 93% battery left. The rejected trade-in phone fulfills the entire trade-in requirements: able to power on, no damage, no cracks.

I then contacted Xfinity Mobile via the Online Chat platform. The associate from the Online Chat platform asked me to contact the Assurant. However, the Assurant said that they did not handle trade-in problems and asked me to contact my carrier, i.e. Xfinity Mobile, instead. I then contacted Xfinity Mobile again and the Online Chat associate said they could not change the results of the Assurant and thus, could not offer any trade-in credits. The associate also refused to accept any proof of the trade-in phone being able to be turned on. I now have to pay the full price of the new cell phone.

If there was no trade-in offer, I would not have bought the new cell phone with full price from Xfinity Mobile. There were several other carriers offering discounts with the same model when I bought the new cell phone.

My trade-in credits were completely declined simply because of the wrong diagnosis made by the Assurant. I don’t think this is fair to me. What can I do now in order to get back the trade-in credits?