Did I ruin my Dom by storing it in the fridge?

[Cincin4]

I am indeed an amateur and I stored bottles of Dom Perignon in my fridge. They have been in my fridge for 2 years. A friend told me that they are ruined and that I should have stored them in a cellar, but I don't have a cellar! Are they really ruined? If so, where else can I store them besides a cellar?