Not recieving Password reset emails

I use the website Artstation to host an online portfolio for my illustration work. Over the past several days I've tried to reset my password and get 2 factor confirmatiom codes but got none of the emails from them. Their not in my spam/trash folders and I know for certain I'm using the correct email address and I've reached out to Artstations customer support. They confirmed their having trouble with the comcast email system and that they may be getting blacklisted and blocked before their mail can send. 

I need this issue resolved ASAP