Don't leave it at that.
When you call, ask to be put through to their underwriting department.
If you crash it and it is insured as an Eleganza, you can be sure that they will screw you. Insurance groups as published in car brochures and magazines actually don't mean anything.
UKI have a different grouping, 1-100 rather than 1-20. The Eleganza and Sporting will almost certainly not occupy the same rating. Therefore your insurance contract will not be valid.
My dealer has told me that there have been many problems with getting insurance details, and this situation does not seem to be improving, hence the need to speak to the underwriters when you call next. Don't settle for anything less, and DO NOT insure the car as a different model, even if it means you can't drive it.
Good luck!
Alex