stupid contractor

Siao! Crazy! Gila! Sampat!

I settled the renovation fee about 3 months ago with valid receipt and now the contractor is calling me telling me that i still have outstanding balance of RM550. At first, during my grandpa's funeral, the contractor called me telling me nonsense about oustanding RM50. Now, after a few months later, he called me to inform me about RM550 balance?!?!? Insane. First it was RM50, now RM550. I think they should just hire a new accountant or accounts clerk. I'm too lazy to entertain such people and asked him to call my dad. Let my dad teaches him a lesson. Disturbing me only.