i want my order delivered in time please

i order an invertor on the22 november and paid for, when i order it was showing that ill receive my order in 2-5 day, but now is showing tha.t my order can only be delivered on the 7th of december, so disappointed. i try to send email but no help at all my orde number ***8 . please help me get my order in time as no movement is showing at all. I'm willing to cancel if possible get it somewhere else as i need it . the supplier is in jhb .