Delivery of handset to incorrect address

An agent called me on Monday to upgrade my line, I provided her with my updated details included my company address, today when I called in to follow up on the handset, I was advised that the handset was delivered at my previous work place which I no longer work for, this is an inconvenience and I am unhappy with the service and require someone to call me to rectify this, today I spoke to Sithembile Zungu who was less interested in assisting