Nissan of Melbourne Dealership Automotive Warranty not being honored by Nissan of Melbourne Melbourne Florida

Nissan of melbourne is not honoring their extended warranty for radiator and transmission repairs as it clearly states in their wording:  "As with the prior extension, this extension of warranty on the radiator assembly will cover damage caused to other affected components, including the vehicle transmission, as a result of an internal leakage condition in the radiator assembly.  However, existing powertrain coverage applicable to the transmission (5 years/60,000 miles) otherwise remains unchanged."

I am mother of 4 children that has to drop off my kids at 3 different schools and this is my only form of transporation.  I have had a pattern of Nissan Melbourne not doing what they should be doing with the repairs of my vehicle.  I am the only one working and am a Florida Headstart parent representative board member.  I feel this issue needs to be investigated because they are not honoring their own warranty to cover the repairs for the radiator and transmission.