May be worth soaking them in some soapy water overnight and see if it loosens anything up. I believe all Vic knives are warranted. In the US, I did not need any paperwork for any I have sent in for repair.
I just bought an OC Electrician. The blades were hard to open on mine as well. I soaked it in hot soapy water for several hours then gave it a thorough WD40 spritz. I rewashed it and its good to go. I think on mine the grime got all gummed up. Go ahead and send yours in. It doesn't matter if its Vic in the US or abroad as its the same company.