Australia Post unreliable lately?

Hi,

 

I have had alot of item that are taking much longer than they should to get to people.

I keep getting contacted by buyers that they have not received their item. I post them on the same day or the day after. I give them a refund then they contact me a week or so later and tell me that they have just received their item.

Anyone else having this problem lately?

Myabe I'm juts having bad luck.

Thanks

Teri