Complete incompetence and no delivery

Received a call on Monday from RAM 27 Nov 2017, advising they want to deliver my parcel at my home address. Advised them that I was at work and requested that the parcel be delivered between 8am - 5pm at my work address on Teusday 28 Nov 2017, which they confirmed. On Tuesday 28 Nov 2017, I received a call from RAM advising they are on route to deliver my parcel at my HOME address. I again advised that i requested delivery to my WORK address. I again arranged that the parcel be delivered on Thursday 30 Nov 2017 at my WORK address. Thursday I receive a call from RAM advising they want to deliver at my HOME address - seriously? I again advised that I requested delivery at my WORK address. However since it seems they are persisting on delivering at my HOME address, I request that delivery takes place on 1 Dec 2017 at my HOME address but before 12. On Friday 1 Dec 2017, I contact RAM customer services and confirm that delivery takes place at my HOME address before 12. However I receive a call at 11:13am from RAM advising they will deliver between 1-3pm . How can they get this sooo wrong on sooo many occasions. I called customer services again and apparently spoke to team leader Ihzaan Zahad, which was an absolute waste of time. He has no interest in sorting out this, he only advised that he made a note on the system for them to prioritize delivery and that's it. Absolute incompetence!