I liked the professional approach of the Frontline Collections team. They requested copies of the unpaid invoices and checked them before accepting an order from us to ensure we had the legal claim for the money.
As for the results, 80% of the sum owed to us was returned in about a month. Frontline's team are probably miracle workers because when we tried reaching our debtors ourselves, they either avoided any contact or fed us multiple excuses as to why they couldn't pay.