Dawn wing couriers

The worst service i have ever gotten from a courier company. I got an sms on the 31st August saying my parcel is out on delivery and should receive it by 6pm.At 16:21 i get an sms saying my delivery is next .I waited and waited but nothing. On the 1st September i got another sms saying my parcel is out on delivery again., i didn't get my parcel. When i track the call on their website it says that i cant be reached, mind you i didn't get a single call from them. I have called them 4 times today and they said they would call me back, i am still waiting