PMC Courier shipping

I bought a Doogee S110 Mobile Phone through PMC Jewellery, my purchase went smoothly however, the Courier Service was a nightmare as I tracked my purchase on a daily basis and noticed there was an issue with the shipment when it arrived at the Sandton Courier Clearance. I knew there would be a Customs Tax to pay and release. To my dismay no communication to me from the Courier or PMC to state a Tax payment is due. I had to do all the dog work with the Courier Company, emails did not work at all, PMC tried to assist but still no communication from the Courier. Finally after 5 WhatsApp attempts with the Courier, I chatted with a person who looked into my shipment and was told to please send my ID No, Tax No and Email address to them, within 10 minutes I received an E-mail from a 3rd party to pay R507.00 Customs Excise. The next day my shipment arrived. Conclusion, why did I have to go through agonizing back and forth emails about my purchase and shipping? After all PMC had all my credentials to deal with the order and communicate with me, sadly only to pass the dog work to me.