Is the tenant responsible for the high electricity bills from a faulty chiller unit?

Dear Sirs,

I am facing a serious issue with regards to the chiller unit of my flat. I stay in Ajman in a 2-bedroom flat in a tower owned by a real estate company and the flat owner is an expatriate.

My cooling bill from the real estate company is coming abnormally high even when we didn't use it during the winter the chiller charges keep on coming.

So when I contacted the real estate company they send a technician and checked and told me the issue is with the units installed inside the flat not outside and it's not their responsibility.

Then I contacted the flat owner who sent technicians and found some faulty components and replaced them.

Now I have incurred a total cooling bill of more than AED 8000 from the real estate company, which was just due to the faulty components of the AC parts installed inside the flat.

Am I liable to pay this amount?

Both the real estate company and the flat owner refused to take responsibility.

Kindly guide me on what options I have.

V. C. T.