أمل خميس

Dear Sir/Madam, I am a 50% owner of a leasehold property. The lease agreement does not specify joint or several liability. It only mentions "xxxx and yyyy" as the lessees. We have not paid service charges for the last 3 years. The other co-owner left the house 3 years ago and ceased all communications with me. The co-owner is uncontactable. The management company initiated an RDC execution case against me and my co-owner. Am I liable only for 50% of the total due amount? Or am I liable for 100% of the due amount? Can you please inform the correct article of law that covers this issue?