Get in touch with support at http://support.avast.com Open a ticket and accurately choose your department and write a clear and compelling subject. Chose a high importance level.
I believe this is related to the same aggressive marketing behavior that did this to me twice in 4 days and sent me hyper aggressive marketing emails over 6 months. Lukas Hasik (VP Customer Care and Satisfaction) feels it is a bug. I feel it is an aggressive marketing campaign. Interestingly I purchased my (2nd) renewal in January 2015 also, on the 27th. This was turned off and all remaining time gone and I was told it expired. I wonder if there is a bug in the system not logging the January 2015 purchases correctly?
Do not run your PC without protection, get this resolved asap, meantime purchase another 1 PC license if you have for now (avast! will refund you for it once your situation is sorted out.) Otherwise use Windows built in antivirus program for now.
Good luck!
