Landlord charging me twice for my electricity and water bill

Hello, I just want to ask what we can do, because we moved out of our previous rented room, before we left we paid a rent of 5000ntd on 5/13 including the room, electricity, water and heater. And before we moved in we also had a deposit of 5000ntd, now we left on 5/18. The owner told us that we still have to pay the rent we lack which is 435ntd, but we should still get 2000ntd from him. He sent me what we need to pay, I saw there that the previous one we paid on 5/13 he wants us to pay again.

I asked him several times why I had to pay our bill in April, even though it was paid, but he didn’t answer me properly. He insists that I should pay for our consumption in April, even though it was already paid.






Back home my landlord would send me copy of EVERYTHING relevant from the electricity and water companies plus then counted and highlighted what is related to me.

When I overpaid, he sent me money back, when the prices of electricity went through the roof, I had to pay extra, but he documented everything for me well.
There is no way he would just scribble something on paper and demand money.
I was very thankful for him, now when I see this, I need to say it again: God bless him!