Are they an authorised JLR dealer? Your warranty description does not suggest that.
If you are dissatisfied with their handling of a warranty claim, consider reviewing the Consumer Rights Act or consulting Trading Standards. Regarding JLR, it is unlikely you would achieve a favourable outcome as the vehicle is over three years old.
The dealer is unresponsive; is this a big dealership offering a one-year approved used warranty, or a lesser independent dealer providing a three-month warranty? You did not specify.
Market it here; individuals engage in such transactions.I purchased mine from a member on this platform. One should receive £50 consistently throughout the day, particularly advantageous for individuals possessing older vehicles such as mine. Mine is permanently located in the trunk of my 212. Assisted me and others numerous times.
Someone enquired about this on another topic; the response was negative, as they appear identical yet are not the same, allegedly. It is unfortunate, as I would prefer to undertake that myself, or at least adhere to the MB V3.0 specifications.
A commendable series of YouTube movies by a somewhat eccentric Russian individual demonstrates the precise volume (in litres) of oil required for an engine before the crankshaft aerates the lubricant; he used transparent Perspex sumps for clarity. It is a substantial quantity! Should I locate the videos, I will upload them thereafter.
Did you do a soft reset to synchronize with the change? I am astonished that you encountered issues; I am certain that it is the sensor I changed shortly after purchasing my GT. It resolved my problems and did not produce any errors.