Not according to this:
I had a bad start on Chess.com. Can I close my account and start a new one?
Playing badly does not mean you should close your account and start over - after all, your online chess career is bound to have the occasional slump.
Just stay positive, keep playing, and your rating will evolve towards ever-greater accuracy.
keywords: close account closure start over fresh
I know ICC will restart your rating if you pay a small fee. Does Chess.com have something similar?