followed renewal procedures for norton internet security and got norton anti-virus

after following the renewal procedures in an email from norton informing me that my 2011 NIS licence had expired, and after having given the credit card ok, the installation procedure informed me as the last step that if i continued, i would be removing a norton product with more features (NIS) than the norton anti-virus it was now installing (anti-virus),  since i had already paid ($52.62 incl. tax online credit card) for the 'renewal' which i assumed was norton internet security, i continued on so that i would at least have anti-virus in the interim.   my intention was to renew NIS, ... i was 'deceived' by clicking on the renewal note from norton, ... how do i get to NIS from anti-virus without paying double?