Poor delivery and shocking customer service

I ordered a lamp from Mr.Price Home and they delivered the stand without the lamp shade. I contacted Mr.Price and told them that the lamp shade has not been delivered with the stand. He checked on the system and said the lamp shade was still at the shop so I can come and collect it. I then told him that I wanted it delivered as this is part of the service I paid for. He then contacted the courier service and said that it will be delivered in 5 working days. After 5 working days the lamp shade was still not delivered after which Mr.Price contacted me asking if it was, checked on the system and the excuse was there was a confusion with the courier company as they were told I was coming to collect it at the store. He rearranged again for the courier service to drop it off. It has been more than a month and the lamp shade has still not been delivered. On top of this I have logged a return twice online for the return of one of the chairs I bought and mentioned it on the same phone call of the lamp shade. I was told the chair will be collected the same time the lamp shade is dropped off.