Dissatisfaction

I received a receipt regarding a parcel that I needed to collect from a purchase I bought online, now I went today at Jabulani MALL post office P. O KWA-XUMA 1868 and to my dismay they can't find the parcel but was assured it's there, now I'm being very inconvenienced for starters because I need to have it by the end of the week. Track number I ********** 17, please somebody must just get back to me regarding this parcel I understand that packaging becomes misplaced but that is not my problem. Need this to be resolved asap