No words to describe how awful this courier service is

I have never been soo disgusted with a courier services in all my life last week they sent me a parcel i did not order, the parcel i received from the outside it is just a plain bag front and back with no details of mine and the company i ordered from when i opened my parcel i was utterly shocked to find LETTERS! LETTERS!! containing information i know nothing about when i did go back to the courier company HPS courier that delivered the parcel they gave me their office number from George and i don't remember the lady's name but she was soo rude and told me to deal with it she can't do anything about it and all i asked for is just the slip that i signed for to prove and to apply for my refund from the company i ordered from i swear the next time i hear Dpex i will throw up