Trafalgar Property Management

I have rent an house in a complex through Trafalgar Property Management beginning of 2019. My contract then stated that my water is included in my rent every month. When they have sent my new contract at the end 2019, they said that the water will be billed separately every month(I didn't even signed the contract). From Jan 2020 i have never received a water bill or anything regarding my water. In Aug 2020 they sent me an email with all the amounts of the water for each month. I have asked for the municipality invoices so I can see if that was the amount of water I've been using, becaus it was high amounts and never in 2019 was there any complains about the water, but as soon as the lockdown started, there were "queries" but no invoices for me. I gave my notice in September 2020, and moved out end of October. They have deducted all that water money from my Deposit which I think is unfair and before they even paid me my deposit I have asked numerous times for my water invoices. And when I queried it again after I have receive my deposit,they told me that the case has been finalized and have nothing more to say to me. Pathetic property agency.