Worst courier service!

Package was supposed to be delivered between 29 April and 1 May. I called on 5 May and was told that it was out on delivery and it would arrive the next day (Friday, 6 May). On Friday afternoon a guy called me from the courier company to confirm my address. He had the area wrong. I told him the correct area and he said that it would be there on Monday. On Tuesday afternoon (10 May), I called again. Spoke to a very rude woman who didn’t seem interested in helping at all. She even whispered a rude comment under her breath. When I called her out on it, she panicked and pretended that she couldn’t hear me. Eventually on ending the call, she promised that my package would be delivered the next day (Wednesday, 11 May). On Tuesday 17 May I called again and when I gave the tracking number, I was told that they can’t find my package. Cannot believe this company is still in operation!?!