Licences expiration

Last week I have contacted adobe livechat spport as on my private account over 1000 photo licences that I have transferred from Fotolia have vanished, without any information on what have happenned. After I have contacted livechat support I was informed me that licences was deletaded as they have expired. The problem is that adobe cannot show me legal base for errasing my licences as I was not informed about 1 year expiration date nor when I transferred licences nor befor canselling them. All licences where prepaid and I have invoices on them so I can show what amount of money did I lose by unlawful restriction of access to the service.  First time that I had information about expiration date was on the livechat and then by following mail. Still I think that if I was not informed in anyway about expiration date I should not loose my licences. I am ready to file a lawsuit in connection with the unlawful restriction of access to the service.