Not sure it even took that long. Suspect the FA just set an Out of Office something like:
"Thanks for sending your email to the FA. We are currently receiving a high level of correspondence, so please allow 48 hours for a reply*.
* Unless you're writing from Huddersfield, in which case here is...
I said it on another thread but that bloke they brought on looked nothing like a footballer, let alone a Premier League striker. They must be shitting it, if that's what they're left with.