Bad courier service and customer service

I placed an order from herbalife and they use dawn wing for courier. They got my parcel on monday the 13th April 2020 but till now friday i still have not received the parcel. When i called on 15th April Wednesday they told me my address was incomplete and i gave the complete addresse. I called on thurday 16th they still told me about address is wrong. I had to change to my home address because i am off on friday. She told me the parcel will be delevered but when i call this morning i was told that delivery will be on Monday but the promised that friday i will get it. When i call some hang up my calls