Bad customer service

I submitted a claim for insurance for device lost on the 5th of February and submitted all the required documents and even paid excess fee.On the 7th of March my phone was sent out for delivery to courierIT with an incomplete delivery address details I've been calling MTN and telling them to correct this and they haven't done it and I even logged a complaint with MTN and no one has responded to it only automated email saying a member of their stuff will get in touch with me however no one has got in touch with me even update me with the progress of my complaint it been hell of a ride for a whole month I cannot get in touch with my family because I have no phone.