Where is my trade in?

I sent my phone in July 21st 2025 as a trade in and was supposed to receive a $700 credit for it. It is now December 12th 2025. It has been almost five months. I have heard nothing from Assurant about the trade in. I have spoken to xfinity live chat at least 30 times in the last 5 months. The last time was November 22nd 2025, and I spent 6 hours talking to multiple people. They all told me the same thing. One of them said he would open a ticket for me to figure out what’s going on. That never happened. Where is my phone? Where is the $700 trade in credit? Why am I still paying $100 a month when my bill should be $70? I am at my wits end with this. I cannot handle speaking to another live chat agent. They don’t understand what I’m saying, they just pretend they’re doing something and then do literally nothing. Again, my phone was mailed to Assurant July 21st 2025, and it was marked as delivered July 25th 2025. I can’t get ahold of anyone at Assurant to ask them what’s going on. Xfinity has been useless about this whole situation too. I’m so sick of this company. Literally where is my $700 credit or the phone I traded in?