Non- existent customer service

I have been tyring to simply do a change of ownership and activation on one of my clients vehicles as they require it for Insurance reasons but for the life of me I cannot get anyone to assist me with this. I am constantly being transferred to a different department but the transfer never goes through and if it does go through I speak to someone who left Netstar 2 years ago. Absolutely pathetic customer service from them and considering that this is an Insurance requirement (there is no cover for the vehicle if there is no tracking device) you would think that they would have great customer service as so many people rely on them.