There is no "suppose" about it... You may take it anywhere you wish...
Landxcape is an Argos brand name - low grade, low price, high volume. Argos want you to buy a new one when it fails - it will not be in their interests to have a repair channel.
You do not say the model number of your trimmer or what's wrong with it - you may get a friendly old codger to repair it for the price of a couple of beers but depending on the fault spare parts may be very difficult to obtain unless you live in China - which you do not...
Good luck...
Friendly Old Codger
August 2009