Changed ROM now Licence won't work

[SparkyLLK]

Hi,

I have a Samsung Galaxy S3 Mini, with a Custom ROM installed (CyanogenMod 10.2). I recently was playing around with OmniROM and decided to switch back to CyanogenMod.
I upgraded to the premium Avast Mobile Security, choosing the pay monthly option (not sure if this will affect anything), however when I try to upgrade my AntiVirus on my phone it says "The Licence submitted was invalid. Please contact support"

I'm wondering what I should do, I've recently paid for the Monthly Subscription, so I do not want to have to pay again if I can avoid it.

Thanks for your help

[m_nosal]

Hi,
probably the best thing you can do in this situation is contact support.