UPS staff are ***********

I ordered a package which was supposed to be delivered to me last week. On Wednesday 24 October I phoned UPS and asked them to change the delivery address and I was told that the package would be delivered on Friday the 26th. On Friday UPS told me that the delivery address was incorrect (it wasn't) and they couldn't deliver till Monday. On Monday I was told that the previous person I dealt with did not update the delivery details and that my parcel would be delivered on Tuesday. On Tuesday when I phoned UPS, I was told that the delivery address is incorrect, I once again gave the correct delivery address and I was told that it would be delivered for sure on Wednesday 31 November 2018. I phoned UPS this morning and I was once again told that the delivery address is incorrect. These call centre agents at UPS are the most utterly *********** people I have ever had to deal with in my life. Why is it so difficult for these people to change an address?! After a week of phoning I still have not received my parcel!