Reduce DVLA telephone waiting times

When phoning DVLA with a query one eventually hears a pre-recorded message announcing that waiting times may be 45minutes. Often, mid-way through that waiting time, calls get disconnected leaving the caller with no option but to re-dial and go through the whole  procedure again and again.
If this situation existed in the business world, businesses would lose customers. However, as DVLA is NOT a business it doesn't need to worry about reduced customer numbers. They are the only body we can contact for the information we seek,
DVLA need to reduce waiting times by increasing the number of its call handlers and / or by installing a far better call handling system.