Poor delivery services, Non existing contact center

I bought 2 screen savers and covers on the 19th April and paid for them differently. one delivery was for the 20th the other for 23rd. on the 20th at 16h40 I received a message telling me "Recipient wasn't available to take delivery, so we'll reschedule" yet all this time Ive been home waiting on the delivery. Following at 7h25 another message "Recipient wasn't available to take delivery, so we'll reschedule" no communication made as I was home again. Tried calling but was put on hold for 25 min then the call went dead. now just got anther message to say the delivery will be made this afternoon, no communication made to find out if there will be someone to receive the parcel being Monday. The other delivery scheduled for 23rd is now moved out to the 30th, no communication or whatsoever. This nonsensical and unacceptable.