Where is my parcel???

I placed an order online on the 10th May and approximately 2 days later I received an email advising that 1 item on my order is finished and will get my refund. I did get the refund as advised but I am yet to get the remainder of my order. The parcel has been shipped from the 12th and the ETA was the 18th May. It's been a week now and nobody is getting back to me to advise me where is my order!