Double Billing

I have been a fibre customer since 2019. I moved from one unit inside same complex to another Unit.

Now Home-connect has billed me under old unit for the month of May 2024 and still expect me to settle subscription for new unit under pro rata basis.

when i called in, i am advised that i still need to pay in full for old unit. Now take into account that Frogfoot has disconnected that ONT so i cannot be at two places at the same time. How ridiculous and furthermore, their service during entire process of change was ****ndous