Unreachable for Days!

I am awaiting several packages from International suppliers and trying to track these parcels with EMS SAPO is almost impossible. I have about 12 different numbers and can not reach them for days on end. I got lucky once after trying for about 3 days only to find out the packages was sent back to my local post office, and once there they verified on system that EMS SAPO made a mistake and that the parcel is still with them. This is UNACCEPTABLE. This is suppose to be a customer and general service by the Government/state/municipality.