Parcel untraceable

I was sent a parcel on the 8th Jan 2018, till today I am unable to track it. I then tried to call the customer service team, but got no response even after staying on the line for 30min. I then opted to send an email, after 3 days I received feedback that the parcel is at JHB post office, I tried to call the JHB post office to confirm, but the number does not exist. I physically went there 3 times and the office building was closed. I then followed up on the email, notifying them of this issue, but no feedback. I need urgent assistance please.