Do not call an electrician - an electrician knows about house electrics - your problem needs a domestic appliance engineer - one who knows about fridges.
The house electrics are tripping because of a fault with the fridge - the main circuit breaker senses an unsafe condition - a short to earth.
The short may be due to excessive water in the electrics of the fridge - from all the defrosting - or it may be due to a fault. Forced air drying might cure your problem but the issue you will have is just how long to do the drying for.
Your issue will be nothing to do with any fuses.
Modern fridge freezers do not need to be defrosted - they do it themselves automatically.
There are videos on youTube showing how to repair Samsung fridges.
Good Luck...
August 2015