On-line order disgruntlement

I app**** for a cellphone contract online on the 7th Feb 2018. It was delivered on the 9th of Feb but it turned out not to be what I ordered, I received 3 x phones instead on 1. Called the callcentre and an arrangement was made for the phones to be collected which happened on the 14th Feb. Since then I've been calling to cancel the incorrect contract - first I was told to wait for the warehouse to receive and clear the items, now it shows the warehouse has received but no one can give a direct answer regarding the cancellation, every time I call I have to start from the beginning and no one seems to know how to assist to get this matter resolved asap. Am so disappointed and cannot get another phone until this is resolved.