Surely iMile should attempt at least 2 to 3 more phonecalls before failing SHEIN delivery. I am LIVID!

Imile are the local logistics company in South Africa who deliver orders placed on Shein. I have an extremely urgent order I am waiting to be delivered. Delivery was due yesterday. I received one telephone call in the morning, which I inadvertently missed. I had my phone with me all day to take the call from them, but nothing came in. Then last night I received an email from Shein to say that my delivery was failed due to insufficient address/phone number/no one at home and that I have to contact my local carrier to get the parcel soon in case it gets returned to sender! I have tried numerous times to contact the local carrier but the message states that the number does not exist. I tried to call back the number which I had a missed call from and the message states that the mailbox is full. I am BESIDES myself with stress about this. This order is for clothing I need to take with me to attend my brothers wedding! I tried to track my parcel and it just says failed delivery. I have logged several complaints via whatsapp and via the website and it states that someone will call me. I am waiting with baited breath to receive a call so that I can receive my delivery. It is extremely frustrating that the only means of communication with them is via a chatbot which has extremely limited options. surely if the first phone call is failed they should attempt at least 2 or 3 more calls before just booking it as a failed delivery. I had a successful delivery from them earlier this year and there is no change in the address, so it is not about the address. I was home the entire day so it is not about nobody being home. It is simply because I missed one phone call. which can happen to anyone!