Order not delivered and no one is taking accountability

On the 8th I app**** for a contract device with an agent and he told me that my application was successful and I will recieve my order between 2-3 days.Got an sms from DSV courier that the device will be delivered on the 12th.On the 12th I got an sms stating it will be delivered between 12-2pm that day.My order was not delivered with no reason why or communication made.I contacted MTN to let them know on Facebook and the agent told me DSV will get back to me but they only sent an SMS about network issues they were experiencing.I made calls,Whatsapp text and emails to MTN but it seems I'm not being taken seriously. I called and was transferred to a contract agent who was very rude she gave me the direct line to call DSV but when i call I get place on hold for more than 30 minutes. No one in MTN is assuring me that I'll get my device or giving me any feedback.Its as if they don't care as long as they make sales which is just crazy for us as customers.How am I the one that had to contact DSV when it is hired by MTN as their courier/deliver company?