Contact details not updated and delivery not made

I'm so disappointed in your service after I sent your online customer service numerous emails regarding my number change and your agent Mishka and Conrad assured me that this was done which obviously was not I paid for the same day service and still did not receive my order and my number still not updated because I got an email saying the COURIERS couldn't reach me.please fix this because I need my order delivered and my refund for the same day delivery as this service was not rendered