how long for mile re-deposit

Flight was cancelled. Had used miles to bag a u/g.

Sent email to request that 20k miles be redeposited. This should, AFAIKT be instant and automated.

This email was received on April 19th.

Should I call/email/sky-write encourage UA to redeposit miles, or will it just take its own sweet time?

Any experiences?

Thanks

<quote>Thank you for contacting United Airlines.
I sincerely apologize for the disruption in your travel plans.

In review of your reservation XXXXXX, a re-deposit request has been forwarded to our MileagePlus Service Center.

Our records indicate flight xXXX on April 11, 2013 was cancelled due to extreme weather.

I understand how disappointing it can be when a flight is delayed or canceled and your carefully made travel plans are interrupted. Our goal is to provide timely flight departures whenever possible; however, the safety of our customers and crew will always be our first priority.

blah, blah, blah
</quote>