Waiting for parcel since the 20th of December

I’ve just had the worst experience with DSv my parcel was supposed to have been delivered on the 20th but it wasn’t, when I called on the 24th I was token that they couldn’t deliver because of an incorrect contact number. I gave them the correct contact number and now every time I enquire I just get told that an email was sent to the London branch and no feedback has been received since the 24th when I spoke to Margaret Ledwaba. I just so disappointed and don’t know what to do now