Assurant return damaged device package Empty!!

I broke my phone in December and filed a claim through Assurant INC. , who sent me a replacement phone.

On December 22, 2022 i returned the broken Samsung Gallexy S 21 Ultra black to Assurant INC. with the provided prepaid postage envelope they supplied. In the month of January Assurant INC. applied a fee of $696.49. Upon seeing these charges I imediately got in contact with T-mobile because the charges were applied to my T-mobile account. T-mobile stated Assurant is responsible billing party and the resolution would have to come from Assurant, they can not take the balance off. I imediately contacted Assurant INC and they stated they have the package but they need 2-4 weeks to process and scan the package to enaure correct device is in package. I allowed the 2-4 weeks but the charges were still there so i initiated contact with Assurant INC. who advised me that the process was taking longer then usual and they still havent scaned the device. These charges are still there today i have continously contacted Assurat INC seeking resolution to which they have provide none and are now stating the package was returned empty and the charged were valid,which is incorrect. I asked them to do a claim through USPS which they wont do. I have a tracking number showing the device was deliverd yet im still being charged. As a result of these charges my phone services has been suspended by T-mobile and can not be restored untill these charges are removed. This has to be illegal and there shold be a lawsuit filed!