Kent RO — Working machine damaged by kent engineer

On 16 april i lodged a normal service complaint[protected].engineer came on 17 april Mr Surjeet[protected] at 11.30am.he did some filter cleaning & asked us to change 3-4 filters but we refused as it was changed last at 17 april 2022 and water was filtering fine BUT the engineer don't know what he did, now the water is not filtering even . Complained to kent customer care at[protected] at 11.50am & 2pm to send a senior technician but no one visited. Called [protected] level 2 escalation kent at 6pm but still im receiving sms that my complaint is closed & they can't service.