Terrible After Sales Service

I purchased a watch strap online from the apple store for my apple watch only to find when it arrived the box had been previously opened as the tape that seals the box was undone . I attempted to fit the strap and found that the one end could not be fitted because one of the pins were protruding preventing this from happening.I went online got their contact numbers and tried calling them. I tried for 2 days , it was either engaged or each time i got through i was cut off. I sent them an email which took them 24 hours to respond to . I told them that the quality of the strap was not good and id rather pay in a bit extra for a better quality strap. They agreed and sent me a quote and had the damaged strap collected , i paid the money and that was the last time i heard from them . I have sent countless emails without receiving any correspondence from them . I am furious , the service is PATHETIC , especially for such a huge company . I can honestly say that this in one of the worst encounters i have had when buying from an online store. I will not be using them again and will make sure that people are aware of the bad service that the Core Group provides to their customers.