Delivery date exceeded

I have recently ordered 2 items from Zasstra.com with an estimated 5-15 day delivery date. No feedback during this period until day 15 when I received a non-com-mental email stating only the order is delayed. No reason for delay. I then complained about this, as had I known they would be so slow, I would have paid more and purchased elsewhere. 2 days later I receive another email apologizing and hoping that my comment would improve there service. REally??? I ordered a tempered glass screen protector and guess what, today my phone fell and screen cracked...now costing me over a R1000 to fix. I will never make use of Zasstra.com again. Your service and information sharing is shocking. You have earning interest on my payment since 4 January 2018 and I have most definitely had no joy from you.