Problem With Courier please help.

Hello Peter my name is Barbara Nompumelelo Yvonne Thwala I write in connection with a parcel that was supposed to be sent to me by a courier company.I don't have the name but I have their number.I was called on the 2nd May this year about a parcel addressed to me from the Department of Education.They told me that it was an envelope and a box.They told me they are going to deliver at my home address.I told them that I have moved from that address(53B deJager street Ermelo).They promised to call when they deliver.After a week I made a follow-up because I never received the parcel.I was told it was sent back to the sender.I was surprised because no one contacted me when they came to deliver.I asked them for the sender's details they promised to come back to me till this day nothing has happened.This is the number***)my ref(630531).I spoke to Lungile.Please find out for me.Thank you.