No delivery after 4th day of being sent out

My package, which contains a Christmas gift has been sent out for delivery on 17, 18, 19, and 21 December, but has still not been delivered. This is the 3Rd time that we have had problems with late delivery. Every time I phone them, they assure me that my package will 'definitely' be delivered on that day or if not, the following day, but this has not been happening. <br> <br> I really need that package asap as it contains a gift for Christmas, and I don't understand how they can drive around for 4 days in Pretoria, and still not have come past my house...