I purchased a t554 HST from my local dealer in Jan...

I purchased a t554 HST from my local dealer in January. Currently at 39 hours, the tractor has been in to the dealer 4 times for repairs at this point. I have reached out to tym on numerous occasions to try and get a replacement for the lemon I purchased. Finally got a hold of a gentleman named Andrew(maybe Andy) who is in charge of warranty repair for the US. I was promised a call back in a day or two, that was three weeks ago. I've made several attempts to get ahold of him since, left voicemails, sent email, and he won't respond.