Business ProfileforC Spire

My mother, ***** ******, died on 12/19/2023. As Executor of her estate, I left her Cspire internet/phone service active while we are selling her house. On October 1, 2024, I called Cspire and advised them I wished to discontinue service at that time. I was told to return the leased equipment (internet modem) to a Cspire location. On October 2, 2024 I returned the equipment to the Madison Cspire store (receipt attached). I called Cspire back and had the service discontinued (on October 2, 2024). Later that month I received a bill for the FULL billing cycle even though service was discontinued in the middle of that cycle. I waited for a prorated bill to arrive. I received a prorated bill for that partial month (final bill) in November. It included a $10 late fee (even though I had no idea what the prorated amount owed would be until I received that final bill). I paid the final bill MINUS the $10 late fee prior to the due date on the final bill. I now find online there was still an outstanding balance of $10 (late fee) on the account. On 11/11/2024 I called Cspire to inquire and have the $10 late fee removed. I spoke to a representative who said he had taken care of the late fee and it was removed. I logged back into the Cspire site after this phone call and now have a $100 balance due. I called Cspire back again to inquire about the new $100 balance due. I was told now it was for non-returned equipment. All equipment was returned on October 2, 2024 and this new equipment fee was never mentioned in the call to customer service 10 minutes prior where the late fee was alleged removed. I had a final bill of $61.89 for which I paid $51.89. I have a receipt for the return of the equipment and have no idea why there is now a $100 balance due on the account and want the account set to $0. It should not be this hard to close an up to date account of a deceased relative and am very disappointed in Cspire.