McAfee Computer virus protection telling me Dealrush voucher code is 'invalid'.

Just wondering if I've been ripped off by Dealrush. In July, I purchased from them a voucher for one years antivirus protection from a wellknown virus protection provide (who I always buy my protection from). It cost 14.30 (huge discount, usually cost about 60 euro a year).
Went to download the virus protection today and it told me my voucher code is 'invalid'.
So I basically spent 14.30 to make Dealrush and softcentre.net (who were the virus protection agent) rich for nothing. Nice money for them if they can get away with it!
Any advice anyone on whether I can get a refund?
And was anyone else ripped off, or was it just me?

Change to the Microsoft Security Essentials instead - it's free, every bit as good and a lot less intrusive.

Was there an expiry date on the voucher?

Contact dealrush.ie, they should be able to sort the situation if the expiry date hasn't been missed.