Terrible customer experience

Honestly I am so disappointed in Budget Insurance. I recently requested for my insurance to be updated to my new vehicle for cover to start 05 July however due to unforseen circumstances my vehicle was not ready for collection today. I have had such I called in today to inform them that I still require my old car to be covered as I still have possession but to my dismay and annoyance there was no one available to update pr make the changes. I tried to explain that I do not feel comfortable driving with a vehicle that is uninsured but I was simply told there is no one to assist and they cannot help. This is terrible customer service. I think I have stayed too long with this company