Reputable third-party vendors, Europe

I need advice on a reputable third-party vendor - after 2 years of being subscribed to Norton 360 Premium, I find it unjustified to pay 109 Euro as a renewal. I am based in Belgium. 

I would also appreciate advice as to whether usually entering a third-party vendor's code in an existing Norton profile usually goes seamlessly...or not? I have looked at competitors, but would like to stay with Norton. However, 109 Euro/y is simply unaffordable (not to mention absolutely non-transparent - one really has to search for this information).

Thank you in advance.  

Is the 109 Euro Norton's renewal price? If so have you looked at the price for a new subscription from Norton.com? It might be less expensive than the renewal price. 

Have you tried Amazon?