We purchased our model 3 through my cousin's account because our order had not come up yet and his did, but he wasn't ready to order. We put our credit card in his account in order to make the deposit. We picked up the vehicle on Feb 15 & it still hasn't been transferred to our own tesla account. I have gotten the specific instructions from tesla support on how to request the process and at least 2 dozen emails have gone back & forth between me and their "help" staff. In each case, i am requesting they complete the transfer, and they respond they don't know when they will be able to. Therefore, i must leave my credit card info in my cousin's account so that if i need to go to a supercharger, i can. He had 2 model 3's on order and his second one is now ready for ordering and he will order. This means either i leave my credit card info in his account and he reimburse me for his deposit and supercharging, or my cc info comes out & his goes in and i reimburse him for my supercharging. Really? I don't understand how difficult it can be to transfer the vehicle from one account to another...a few key strokes, maybe? But, tesla's responses (and lack of responses) represents the worse customer service i have ever experience. They either don't respond at all to my email requests to transfer or they respond that they are working on it but don't know when it will be done. And it has been more than 2 months. And, yes, we have been given directions on what info to provide and where to send it and have done that. Any suggestions on something else we can try?