Really Bad Service

I have been trying to get hold of the SA Post Office via email and telephone since the 5th of June 2018. Nobody is coming back to me regarding a product I have purchased on the 25th of April 2018. The store where I bought the product from informed me on the 8th of May 2018 that the parcel has arrived in South Africa. After which I have enquired with SA Post Office to find out more or less I will receive the parcel, but they do not respond to my emails and I never get answer on their customer service phone number as well as the general office number. This is insane, how long can one wait for a parcel. Bad service from SA Post Office and also to anyone who should be answering their phones....