How can the tenant dispute water/sewage bill

Hello, Tenant was overcharged in water/sewage for Aug to Sep ($28.39) , Sep to Oct ($105.59), Oct to Nov ($74.98), Nov to Dec '25. Tenant paid the bill in full for the months of all months except Nov to Dec. The Leasing Manager emailed to not pay that bill until they review. The leak and running toilet in the unit was the reason for the overcharge. Once repaired in Nov '25, the water/usage bill returned to normal monthly average of under $10 per month. The leasing company AI agent emailed that tenant still owes $61.65 in the bill. After doing the math, tenant emailed the leasing office that a credit was due not an owed remainder of $61.65. There was no communication from the leasing office.  In the leasing office, the leasing agent informed the tenant that $45.69 was credited for Nov and $20.43 was credited for Oct. Nov water/sewage bill was $105.59. Minus the credit $45.69 that leaves $59.90. In all the years the tenant has lived in this unit, they never exceeded about $25 in water/sewage usage. Oct water/sewage bill was $74.98. Minus the credit $20.43 that leaves $54.55. The leasing manager informed the tenant that the water meter is incorrect and that the company based these credit on the tenant's historical usage. However, the historical usage never exceeded $25. They reiterated that since the meter is broken, the tenant can't know for sure their accurate usage and that the the amount due of $61.65 is the correct amount. The tenant replies that since the meter is broken, the company can not accurately determine the tenant's water/sewage usage. The tenant asked them to have the company reply with how they came up with these credit amounts and how they determined that the tenant's monthly water/sewage usage is anywhere from $54.55 to $59.90. They leasing agent said they'll email at the end of day, but please keep in mind, the leasing office is not communicative and will not reply to any follow up or email until after the 3rd or 4th tenant follow up email attempt or unless the tenant takes time off work to enter the office before they close.  Please let me know if you need the invoices for these months and any other documents to help determine how to fairly resolve this issue. Thank you