I encountered another billing error. Is had a joint account before with an Green Card for which I paid 99 euros. Then my account got converted to a Supergreen account with the 3 month discount. I now started a pack with my family, and all of a sudden the Supergreen premium is charged on my account (an extra 9 euros) which should be free since I already paid for the Green Card (now metal card). Anyone having the same problem?