I own apartment in complex of 125 units.Unpaid service charges have always been a problem,and have grown by 18,000 in past year.Now standing at 81,000.All units are occupied and rents are strong.AGM is coming up in July.Is there any advice re questions I should ask or suggestions I could make.I believe service charges on some units have never been paid.The complex is deteriorating and sinking fund stands at just 9,000.