I doubt they don't care. If you go to MOFI in California, there are, like, 5 people working there. Really small. They don't carry any inventory. That is all at Music Direct. If you order from the MOFI website, it is actually Music Direct.
So, IMO, they are correct. They can't help with issues. That must be done through the store purchased from.
This is no different than anyone else. Trying emailing Speakers Corner, or Sundazed, or Warners. Same response - sorry, but take it back to the vendor.
If you have a problem with your car, you don't email the manufacturer, you bring it to the dealer. If you have a faulty pair of shoes, same deal. Return to vendor - not manufacturer.