NEED URGENT HELP!

I have never had such a terrible experience buying an item online. I purchased my item on 31 March 2025 and received and SMS saying my parcel is out for deliver 01 April 2025.

When I called two days later they told me the item will be delivered the next day as its the last day for delivery and they can only put in a complaint but cannot help me. I sent an email and they would reply in the next 24 hours and also they would call me.

I called the next day and they said they just unable to give me any information or help me but they will call me. If I call I just get a new call centre agent thats unable to assist, their managers refuse to speak to me. Can anybody from incredible connection assist?