Problems with Diplomat Fridge Freezer model APM6855?

Following a power cut this morning my fridge freezer hasn't stopped beeping and i don't know what to do?

I also don't have a user manual as the previous home owners didn't leave one. Do you know how i can get one - Howdens and Diplomat say they don't have one and apparently it's actually an MFI model - they have now gone into liquidation.

Help - as i'm due to have my 1st baby on Sunday i'm desperate to get this sorted!