EcoAir supplies f-gas products such as Air Conditioning and dehumidifiers. We do not provide installation nor maintenance services. You need to find a local F-Gas qualified engineer to attend to your split air conditioning.
I recommend that you find an engineer through Refcom website https://www.refcom.org.uk/refcom-register. You can use their local search and put in your postcode.
In the meantime, please check that your filters are clean and not clogged up. You can check to see if there is a fault-code on the indoor unit display panel. If you do, email us back and we will give you the likely cause of the fault.