If you are contacted by a company called Euro Systems www.es-systems.com then you may want to consider reading the following websites:
Domain name scam link 1
Domain name scam link 2
Domain name scam link 3
Domain name scam link 4
Interestingly, Euro System's phone number (08445442955) is listed on a website which reports scammers.
I'm not saying they're scammers, but their pitch was nearly 100% word-for-word the same as the domain name scams listed above. I'll let you make your own mind up.
Meanwhile, if you do want to register more domain names associated with your company, then I recommend 123-reg.