renwew already? what scam is this?

i bought my laptop last march.  I bought norton 2 months later, a 1 year subscription.  I just got a email telling me my sub expired?  did you change it to a 6 month sub?  i didn’t even know you offered 6 month subs.  I thought they were 1 yr, 2 yr, or 3 yr.  what did I miss?  please email me back to the email i registered to.  i don’t think i could find my way back here.  guess i’m sol since you don’t have an email address we can correspond with.  no matter.  i wont be renewing if you cheat evry sub out of half the time they paid for.