Tesla is not honoring the 4th pre-paid maintenance for my 2015 Model S. The 4th year maintenance expired once the age of the contract went into the 5th year, they say. For me this is October, a few months ago. I was under the impression the pre-paid plan was for 4 maintenance visits, with the maintenance schedule as listed for each subsequent visit. Had I known about this hard deadline I would have acted differently. Anyone else experienced this?