Angry client

Hi I would like to share this with on the 5th of march 2019 someone bought me a phone huawei Y6 2018 it was posted on the 6th of March via speed service from carletonville to Midrand I went to Midrand post office on the 8th to collect my phone , they gave me the parcel but the phone was not there,I reported the issue same time then it was escalate with the claims department on the 8th today is the 26th of march I haven't received my phone,worse part they not updating me I'm the one who has to go to post office only to be told we haven't received a feedback....I don't know who to talk to anymore because I failed to understand why must I Wait for them to investigate instead of giving me my phone to continue with the investigation....simple