Poor customer care

I am very disappointed. I ordered stuff on SHEIN on the 5th of November and was told Buffalo would be handling my package. I paid my customs on the 11th of November. I was told I’d get my package between 24-28 November. On Monday , the 29th of November, I received an email from SHEIN saying that the buffalo delivery guy returned my package to the warehouse because I didn’t “answer” the phone. My phone was on the whole day, I didn’t receive any calls. I’ve been home to make sure that someone is home when they deliver. I called them I don’t know how many times. I sent an email and sent countless WhatsApp messages. I’m very disappointed and unimpressed.