Did you ask dealer what was involved in the FIX and how much would it cost to have it done?
Your vehicle did not 'qualify' due to its build date therefore it does not 'officially' have a problem.
Until your vehicle is included by MFG. you can not force the FIX for free from any dealer.
So find out what the FIX is and do it your self or pay to have it done.
In mean time take a 3/8 clear tube long enough to reach gas tank......slide it down fill tube and then place gas nozzle next to it and fill up.
tube will provide additional venting and may stop the splash back
Faulty inlet check valve is issue......not closing causing tank pressure to blow back
